All in
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Three casinos. Three bodies. Three days. Crack the case with the Naturals series by Jennifer Lynn Barnes, #1 New York Times bestselling author of The Inheritance Games.
After a string of brutal murders in Las Vegas, Cassie Hobbes and the Naturals are called in to investigate. But even with the team's unique profiling talents, these murders seem baffling: unlike many serial killers, this one uses different methods every time. All of the victims were killed in public, yet the killer does not show up on any security feed. And each victim has a string of numbers tattooed on their wrist. Hidden in the numbers is a code--and the closer the Naturals come to unraveling the mystery, the more perilous the case becomes.
Meanwhile, Cassie is dealing with an equally dangerous and much more painful mystery. For the first time in years, there's been a break in her mother's case. As personal issues and tensions between the team mount, Cassie and the Naturals will be faced with impossible odds--and impossible choices.
Catch every thrilling twist and turn of The Naturals series in:
- The Naturals
- Killer Instinct
- All In
- Bad Blood
- Twelve (enovella)
For more unputdownable series from Jennifer Lynn Barnes, don't miss the beloved Inheritance Games Saga and The Debutantes duet.
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Book Details
- ISBN
- 0316540846
- Binding
- Paperback
- Authors
- Jennifer Lynn Barnes
- Publisher
- Little, Brown Books for Young Readers
- Published Date
- May 2, 2023
- Language
- English
- Pages
- 400
- Physical Info
- 1.2 in H x 8.2 in L x 5.4 in W (0.8 lb)

Jennifer Lynn Barnes does a great job creating suspense, dynamic characters, increasing conflict, and keeping you on the edge of your seat. I highly recommend this series and all in is the best of them so far. Can’t wait to see what happens next.
All In is another great book in The Naturals series! This time, the team heads to Las Vegas to help the FBI with a string of unusual murders. The mystery is full of clues, twists, and just enough creepy moments to keep you turning pages late into the night.I really liked how we got to learn more about Sloane and her past—it made me feel more connected to her character. The group dynamic between the Naturals is still one of my favorite parts of the series. They all bring something different to the team, and their friendships and tensions feel real.I gave it 4 stars instead of 5 just because a few of the plot points felt a little over-the-top, and there were a lot of twists packed into one book. But overall, it was a fun and exciting read. If you like crime shows, thrillers, or books with smart teens solving big problems, you’ll really enjoy this one!
Great book and great author. I have read the whole series. So good. Starting to read her other books as well.
This was a requested gift by a high school age student. It is an easy read and kept her interested. Purchased all four of the series. The gift was well received.
This book was much darker than the last two, and with a much more complex plot line. There were many layers to it, and I enjoyed how she centered much of the plot around numbers. There were many emotional moments, time of elation and sadness, and hints of comedy. It was long but worth it. I also enjoyed so,e sight into Dean and Cassie’s relationship, steady and subtle, and that the book didn’t center around them, but they worked as a team.
- 5 stars: 11 (55%)
- 4 stars: 8 (40%)
- 3 stars: 1 (5%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I loved this book! Even if it wasn’t a plot twist what was interesting was Cassie’s mother, she must be dangerous honestly but she has been watching Cassie all along maybe she even wants Cassie to be part of the cult which is not happening but honestly I love it, I think we got more view of other people apart from Cassie in the book specially Sloane I was just really sad she has a chance to have a family and it was taken from her, Aaron looked so nice and wanted to have a relationship with his sister and Tory? She lost the love of her life because of her brother and Michael well he’s self destroying and hopefully it stops, Judd had closure in this book and I love that for her but nightshade revealing everything? It’s just weird you know I feel like even though Cassie’s mother hasn’t try to get back to her maybe she want Cassie to come get her to take the decision to come home or maybe she wants Cassie to become nine who knows? I’m just excited about the next and last book!
I took this book with me on a long weekend trip and it was the perfect length and easy read. Can’t wait to read the last book in the series!
Jennifer Lynn Barnes does a great job creating suspense, dynamic characters, increasing conflict, and keeping you on the edge of your seat. I highly recommend this series and all in is the best of them so far. Can’t wait to see what happens next.
All In is another great book in The Naturals series! This time, the team heads to Las Vegas to help the FBI with a string of unusual murders. The mystery is full of clues, twists, and just enough creepy moments to keep you turning pages late into the night.I really liked how we got to learn more about Sloane and her past—it made me feel more connected to her character. The group dynamic between the Naturals is still one of my favorite parts of the series. They all bring something different to the team, and their friendships and tensions feel real.I gave it 4 stars instead of 5 just because a few of the plot points felt a little over-the-top, and there were a lot of twists packed into one book. But overall, it was a fun and exciting read. If you like crime shows, thrillers, or books with smart teens solving big problems, you’ll really enjoy this one!
Great book and great author. I have read the whole series. So good. Starting to read her other books as well.
This was a requested gift by a high school age student. It is an easy read and kept her interested. Purchased all four of the series. The gift was well received.
This book was much darker than the last two, and with a much more complex plot line. There were many layers to it, and I enjoyed how she centered much of the plot around numbers. There were many emotional moments, time of elation and sadness, and hints of comedy. It was long but worth it. I also enjoyed so,e sight into Dean and Cassie’s relationship, steady and subtle, and that the book didn’t center around them, but they worked as a team.
The details, the twists, the turns, the plot. But I must warn you not to read at night, because once I started I couldn't stop.
To me, not as good as the other two. I feel like the story gets a little lost with all the numbers :/ Still great plot twists though! And a good book!
If you haven’t started this series, I highly recommend it. Even based on teenagers it’s quite a thrilling read for adults. Book 3 absolutely blew my mind! I love how these teenagers change and grow and their relationships changing and grow. Not a light fluffy red, but a great read, a good read!
Woo! That was a roller coaster of emotions and information! Sorting and categorizing information, ensuring that only what’s needed is stored.
This book was incredible, by far the best in series so far and I cannot wait to start the next one.
Love love love this series!!! This book is tying it all together. Can’t wait for the next. Literally buying it now!
I like this book. The end is a cliff hanger. It adds a lot of new peices to the story.
Jennifer Lynn Barnes does it again! All In is the third installment in The Naturals series, and trust me, it’s a jackpot. This time, the Naturals squad heads to Las Vegas—because apparently solving murders in regular cities just wasn’t thrilling enough. And oh boy, the stakes are higher than ever (pun totally intended).One of the best parts? We finally get to dive deeper into Sloane’s character, and it’s an absolute treat. More stats, more awkward brilliance—what’s not to love?Now, I won’t spill any spoilers, but let’s just say Nightshade isn’t just a cool code name—it’s poisonous for a reason. Things get dark, twisty, and completely unputdownable.So what are you waiting for? Run, don’t walk, to your nearest bookstore—or sprint to your online cart—and get this book! You won’t regret going All In.
Need a buffer before the last book because I’m so sad it is coming to an end! Quick read and entertaining
If you’re worried about continuing on in the series because you disliked the second book like me, then I’d definitely say give this book a chance. In my opinion, this is the best book in the series so far. Added bonus is that there’s little to no annoying love triangle melodrama. It’s somewhat slow at first, but the plot twists make it worth it. I really enjoyed this one.0 🌶️* please disregard grammatical errors due to voice texting. Thanks.
My daughter read this book in one night. She loved the entire series and I love that she reads. It was even during Christmas break!The book was priced under $15. The shipping was fast.
What a plot twist! Cannot wait to read the 4th book and see how it all goes down in the end. Well written and researched.
Six teenage FBI agents are on the hunt for a serial killer haunting Las Vegas. The body count is rising with an inky MO.I have waited more than six months for this book to come out. I bought it this morning at 8:30, and with the interruption of church, lunch, 4H, and my sister pestering me, I finished reading it by six pm.SYNOPSIS:I can't tell you much without ruining it! The Naturals team go to Las Vegas to hunt down a serial killer whose MO stays different, but the only thing linking his targets is tattoos. The Naturals are teenagers who work for the FBI and they have an amazing skill set that includes a human lie detector, an emotion reader, 2 profilers and a walking encyclopedia. They are supposed to work only on cold cases, but end up right in the middle of a hot investigation. The end will leave you wanting so much more! I can't wait until the fourth book.Since I read the first two books, it made a lot of sense to me, but if you haven't read them yet, you will still probably get most if not all of the storyline.WHAT I LIKED: the fast paced action, the mind blowing plot twists, and how cleverly everything ties in with the other authors. She tied in parts of this third book with some of the first book and I thought "How did I not see this coming?!"WHAT I DIDN'T LIKE: The book ends on a cliff hanger, and I have to wait yet again! The book was too short, I know that if it's over like 400 pages, it seems like it's gonna drag, but I don't care if it drags, I wanna read more!I found this book at a book fair where I bought the first 2 books. I read most of the first one on the way home, and it was so amazing! I was jumping on Amazon as soon as I could & found out I had to wait 6 more months for this 3rd book! I feel sorry for the people that had to wait longer.This review written by a 13 year old with help from mom.
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