Need help finding books for my son :)

My son is 6 years old. He loves reading and his dad recently picked out Diary of a Wimpy kid for him. He's loving it and breezing through it successfully. He has trouble socializing and tends to hang out by himself and do activities he can hyperfocus on (reading, building legos, etc). I'm not a huge fan of how the main character of this book treats his friend, and I'd prefer to give him a book that does a better job of normalizing positive interactions with peers (or at least one that doesnt normalize bad ones). I'm going to let him finish the book as he's finished most of it since he started yesterday, but i would love more suggestions for that reading level or style of book!