these are all kinda books i enjoyed during my late elementary school years:
the fog diver series by joel ross — i had a fascination with steampunk things as a child and this let me dive headfirst into the thick of it
tales from outer suburbia by shaun tan — or anything shaun tan for that matter. his art is incredible and daydreaming with his works was such fun. i used to take this book out of my elementary school library almost every week just to stare at the pages
a tale dark and grimm by adam gidwitz — silly and spooky. perfect! and the other two books are just as marvellous :)
the last wild by piers torday — i think it was a book of the year in my school and i ate up story time.