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What Happened Yesterday

by Matt Sturniolo

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Best known as one-third of the Sturniolo Triplets, YouTuber and social media personality Matt Sturniolo unpacks his complex past and makes his literary debut with What Happened Yesterday.

From simple yet meaningful milestones such as learning to drive, confusing moments in therapy, and navigating overnight virality, to the significant loss of his childhood home due to a house fire and the passing of his grandfather, Matt shares with dark humor, raw honesty, and his signature wit what no video could ever capture.

But this is not a sob story. It's a reminder that progress isn't always some huge life-changing moment. Sometimes, it's as small as standing in a grocery store line alone, or making it through an entire school day without running for the door.

As Matt's mom always told him: Yesterday's problems shouldn't affect today. Because what once felt like mistakes or painful experiences . . . is simply what happened yesterday.

Book Details

ISBN
9781956464610
Binding
Paperback
Authors
Matt Sturniolo
Publisher
Brightray Publishing
Published Date
August 18, 2026
Language
English
Pages
242
Physical Info
0.51 in H x 8.5 in L x 5.5 in W (0.63 lb)
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  • 5 stars: 20 (100%)
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  • 3 stars: 0 (0%)
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Paula Marie
Thank You Matt

This book made me cry. Twice. As someone who has dealt with anxiety and depression since the age of 4, I was able to relate to this book on so many levels. As an “older” fan, I came across the Sturniolo Triplets during a rough patch and they made me laugh. But this book allowed me to understand Matt on a deeper level and all I want to do is hug him and tell him thank you. My hope is that he continues to advocate for mental health and I hope others read this book and realize that they’re not alone. Thank You Matt for writing this book!

a
abilene
I LOVE THIS !!❤️💙💛

As a Sturniolo fan, this is the BEST book I have ever read. I don’t like reading books, but when I read this it changed my life. I love Matts book so much, I’m very proud of him and glad that he made this book. 10/10 !!!!!

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Ashley hall
I love this book so much

Hi I’m Neoma and I love this book and it has helped with my anxiety and had helped me know that I’m not alone and I love Matt Sturniolo and now that I have seen her what he has gone through I feel like I understand what he has gone through with mental health better

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Ginalee Girouard
I didn’t know how much I needed this book

I wrote something and I have no idea what happened to it. Round two… I love this book, not only for who wrote it, it spoke to me and I realized a lot of these things weren’t isolated experiences and I wasn’t a weirdo for feeling that way. I hated school, I still can’t stand social events with crowds. I have always found myself looking for exits and also bathrooms so I could go stare off into space. Still at this big age I do it! My bed is my safe place, just leave me and my Netflix there and you go have fun. I always thought I was weird for feeling like this. After reading this book, I know there is an army of people who feel like me. It’s terrible that other people have these experiences but nice to know I’m not alone in this! Kids who struggle with school should read this book to realize early that they’re not alone! Thank you matt for putting this out there, thank you for being you. Thank you for the book. I will be reading it over and over xoxo

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Brooklyn Googe
I LOVED EVERY PART OF THIS! COULD NOT PUT IT DOWN :)

This book was so amazing. I wanted to take it slow but I genuinely could not put it down. I personally think this book should be read by all preteens and teenagers who are struggling with things like anxiety or have issues with school and social dynamics. I loved being able to relate to someone in private and reflect after each chapter and also see steps that might be helpful to me in the future as i struggle with some of these same topics talked about in this book. SO well written and Matt did an amazing job of being transparent and open with what he went through and the events in his life that shaped him and it was an amazing read. Thank you so much! This book was so beautiful and inspiring:) 100% worth every penny and moment spent reading!

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Elizabeth DeWitt
Go get What Happened Yesterday by Matt Sturniolo

It's such an amazing book with what I've read so far even if someone isn't a Sturniolo fan they should still read this book I relate to Matt so much and I could never talk about my live or how I struggle with things like he does thank you Matt for your amazing autobiography

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Whitney J
10/10 recommend!

I have always been a fan of Matt from the start. I’ve always related to him being more introverted, shy, and anxious. I love that he opened up in this book and shared his struggles. Read the book in one sitting, I could not put it down! Will probably reread it several times.

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Grey Eyed Jewel
MUST HAVE FOR ANY STURNIOLO FAN!

Highly recommend for Sturniolo fans. Bought this book for my daughter who absolutely loves the triplets and was over the moon when the book arrived.It's not a long, complicated book, easy to read and has a great positive message. I'm thrilled that she's actually reading it.In the book, Matt talks about his own mental health and the support of his family as he overcame his struggles.I highly recommend.

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Daniel Kamovitch
I LOVE IT

When I first found out Matt wrote and was releasing a book, I knew it was going to be amazing. However, I didn’t realize how amazing it was going to be and how much it would change my life. It was super relatable, and it feels good to know that there’s at least one other person out there who feels similar to how I do.

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Munazza Khan
pls go read !!

my goodness matttttti've been watching you and your brothers for 3 past 3 to 4 years and i've always appreciated and admired the way you talked about your anxiety and struggles with mental health. even since following the yesterdays problem insta a few years ago (when it had a hotdog pfp) i knew i was gonna wait patiently for your personal project because i knew whatever you were gonna do or make, i was gonna resonate with it.the way matt talks about the little and big things that can cause anxiety makes me feel so seen with all my quirks and habits i have due to my anxiety. i know people say "oh the book is so good you cant put it down" and while thats the case in some genres, i deeply appreciate a book that can make me sit for a few minutes after a chapter and just ponder to my imaginary audience (which i did multiple times).this book is not at all a sob story or a cocky youtuber turned author, its a raw, authentic, story about a boy who deals with real human emotions while navigating hard life changes.i would recommend this book to anyone who wants more insight into how someone has dealt with mental health and a new perspective, especially a kinder perspective on yourself and your struggles.im so proud of you matt for all the people you've helped, are helping, and will help with this book. thank you, and i'll see you in new york for the q&a 🫶🏼-alisha

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Samantha Fonseca
this book is amazing!!!

It was so amazing. Words cannot describe how much this book as meant to me. I love Matt so much and I am so proud of him. If you are deciding whether to get this book, I advise you too!! It’s so well written ☹️.

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Brandy Hedgpeth
10/10

I think everyone should read this book it truly captures how anxiety can consume everything you do even when it’s not inherently bad, seeing matt in a more serious manner rather than just being a comedian on YouTube really changed my prospective

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Samantha
An absolute best-seller

Such a beautiful, raw and real perspective on being someone who has struggled mentally from a young age. This reminds you that sometimes things are not always the way they seem and you never know what someone is going through ❤️💙💛 Well written and beautifully told!

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Veneda Jones
Amazing story 12/10 will re read this one MANY times

Wow! The amount of similar experiences I’ve had is kinda crazy to see. Thank you so much Matt, for sharing your story. It was so well written, and the artwork was very creative, and really tied the story together. And it’s amazing to see just how deep and vulnerable the story gets, as you even add in medical/therapy records. I genuinely can not wait to see where you go next!

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Paul
10/10

I just finished the book last night and this seriously needs to be put in schools for kids across the world to read moving forward.Such a relatable, heart warming, down to earth, and beyond inspirational story.I was skeptical at first of really just how vulnerable Matt would get in the book because he has so many eyes on him as a public figure and people can be so harsh on the internet, but when I tell you he did not hesitate to open his heart for the world and wear it on his sleeve… And that was one of the most inspiring parts to me, having the courage to express himself so honestly. Because I know first hand how hard that can be and feel too, having always struggled with being open about my own past/traumas (SA in childhood, a mostly absent father who then passed when I was 19, addiction in my teenage years + half of my 20’s [now 1 year sober though🥹], depression, social anxiety, isolating, feeling behind in life, lack of a support system, etc). This book touched my heart in ways that are difficult to express in just words, but it’s inspired me to be more vulnerable with my own story (something i’ve always felt pulled to do because of how much i want to help other people see the light at the end of the tunnel who have been through dark times too, but have feared experiencing more rejection and shame than i’ve already had to carry throughout my life). But most of all this book gave me hope. Hope that things CAN be different, that I can be different. That I don’t have to let my past define my future through shame, but I can use it as motivation and fuel - to create beauty from the pain, instead of letting it consume me.As a long time supporter it really showed a deeper version of Matt we don’t always get to see. I admire how he reminded his audience that he is just like anyone else in a very grounded way, because I think it can be very detrimental sometimes the way society idolizes influencers and puts them on a pedestal like they aren’t human, and then in a way dehumanizing them. Similar to how people dehumanize homeless people, but the complete opposite end of the polarity. It can be detrimental in the way that the comparison can cause people to be so hard on themselves, and it can be detrimental for the creators in the way that people suddenly think it’s okay to invade their privacy like showing up at their house or following them home in their car or harassing them online. And it’s a reminder that while you may look up to people on the internet and their work inspires you or touches your heart in some way - whichever creator it may be, we are all human at the end of the day. Just as Matt said - “equal”. And I think it’s especially important for kids growing up in this tech generation to be reminded of that.The words throughout this book just further encapsulate how sweet + genuine of a soul Matt is and how much depth + substance there is to him. The way he can bring out such emotion and touch people’s hearts through his words is beautiful. And I really admire how he hasn’t let LA and fame change his core, you see a lot of people become influencers or go to LA and become very shallow just chasing views and likes losing sight of the plot and how much it can rot someone’s brain, but Matt and his brothers have stayed true to who they are and have utilized their platforms to make a valuable impact on people instead, while remaining very level headed.Thank you for being vulnerable and trusting us with your story Matt. ❤️ So proud to see you chasing your dreams and helping point others in the same direction along the way and making them feel seen. I hope you see in yourself the strength that so many of us see in you (and little Matt)!Can’t wait for book #2 :)-Sarah

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Jason Janik
Must read for young ppl in particular

This is a short yet deep read. It comes across very authentic like I could almost hear Matt’s voice while reading. He chronicles his struggle with anxiety beginning at age 11 & how he found coping strategies through therapy & the support of close family/friends. I appreciate his vulnerability & also humor throughout. And although I’m older than his target demo, I still relate to his struggles in school & as a mom can empathize with what his mom went through supporting her son through such a painful time. The illustrations also add a lighthearted touch which still connect with the theme. I’m excited to see what Matt writes in the future.. I believe this is only the beginning for his writing career. Highly recommend especially for young ppl who’ve dealt with mental health in any way. I’m sure they’ll feel less alone & perhaps more hopeful. 10/10

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Heidi L
I’m left speechless

This is so meaningful and the wait was 100 percent worth it. It’s not easy to put out this personal of things. It’s so inspiring to read about someone who went/is going through the same things as you and overcame it. This book gives me so much hope that my mind can and will heal💛❤️💙

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EL🩷
Very Moving

it was beautiful. i was shocked to see how much i really did relate to it as someone who has struggled with anxiety and other mental health problems for years. i truly feel for matt.. i am so so proud of him for releasing this book and for fighting through so many battles in general. i hope he continues to reach his goals. this book truly is one that i think everyone should read. his outlook on life throughout this book is a beautiful one, and a reminder that you should never let your past and struggles dictate your future. :)

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Dalton
❤️💙💛

if you’re a fan of matt, you absolutely need to read this. just have the tissues ready because you’re going to need them. matt, i am so incredibly proud of you. “what happened yesterday” was truly something so special, and i’m so grateful that you chose to open up and share your story with everyone. i know how vulnerable it must have been to share such a personal part of your life, but you are so incredibly strong. you’ve already made such a difference in so many people’s lives, and i know your story is going to reach and impact even more people ♥️

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Crystal L. Daniels-Sampson
so happy for u, matt

as someone who’s been watching the sturniolo triplets for 3 years, i’m so happy that this was matt’s personal project was revealed to be. i got the book early and genuinely read it in a day. i related to it on so many levels and didn’t just learn about matt but also learned about myself. i think every kid/teen and even young adult who’s struggling with mental health should honestly read this because it can give you hope for your own future. matt, you’re truly an inspiration and i can’t wait to read more of your books as you and ur brothers continue to grow up. so happy for u and so glad i got the pleasure of reading W.H.Y.also wanna say that i loved the visuals! they were super playful and added a lot of character to matt’s story.to anyone reading this, remember that your past doesn’t define your future. you can truly achieve anything even if you feel hopeless now. just take it one day at a time, leaving yesterday’s problems for yesterday and remembering tomorrow’s a whole new day!