Diary of a Wimpy Kid books
Captain Underpants books
Kate Klise
The Golly Sisters books by Betsy Byars
Amelia Bedelia books by Peggy Parish
Wayside School books by Louis Sachar
McBroom books by Sid Fleischman
The Princess in Black books
Magic School Bus picture books
Flat Stanley books
Cam Jansen books
Frindle by Andrew Clements
Beverly Cleary
Danny Dunn books
Mrs. Piggle-Wiggle books
Secrets of Droon books by Tony Abbott
Magic Treehouse books
Time Warp Trio books
Where the Sidewalk Ends by Shel Silverstein - quirky poetry
My kids are older, so they didn’t read these, but I’ve heard good things about Scholastic’s Branches books, you might want to check them out.
https://www.scholastic.com/site/branches.html
I tried to offer a range of books. Some of these may be too advanced for him right now, but you can start by reading to him, then gradually transition to taking turns, until he wants to start reading them on his own.