Coming October 13, 2026
Oliver's Great Big Universe #4: Oceans Are Deep!

"Mind-expanding and hilarious! I got smarter reading this!" -Jeff Kinney, author of the international bestselling series Diary of a Wimpy Kid

Science meets Diary of a Wimpy Kid in this original illustrated middle-grade fiction series that blends science with narrative from bestselling author-artist Jorge Cham, the Emmy Award-nominated creator of PBS' Elinor Wonders Why

Oliver's dream of a perfect summer doing nothing is thwarted when his nemesis and English teacher, Ms. Liu, gives him a bad grade in her class!

To avoid going to summer school (which is also taught by Ms. Liu), Oliver makes a deal with his parents to write a new book about the oceans while spending the summer at his grandparents' house near the beach. He'll have plenty to write about as he tries surfing, puts up with his prankster cousins, and learns amazing ocean facts from an oceanographer living in town.

Plus, Oliver makes a new friend in Miriam, whose mom owns the local aquarium shop. Look for disasters involving sharks, wave wipeouts, and a clever octopus named Mr. Wiggles.

With laugh-out-loud humor, Oliver's Great Big Universe: Oceans Are Deep! follows an eleven-year-old who's taking on the whole universe--if he can survive middle school first.

More from the Oliver's Great Big Universe series:
Oliver's Great Big Universe (#1)
Oliver's Great Big Universe: Volcanoes Are Hot! (#2)
Oliver's Great Big Universe: Evolution Changes Everything! (#3)