You are probably already familiar with Roald Dahl's popular titles (which have been made into movies) like Charlie and the Chocolate Factory, James and the Giant Peach, and Fantastic Mr. Fox. If you fell in with the utter silliness, check out some of his other books.
The BFG: Sophie is taken from her orphanage by the Big Friendly Giant in the middle of the night. Can she trust him, and can they capture the evil giants together? **A 4th grade book club favorite!
Esio Trot: Can shy Mr. Hoppy win his true love's heart by creating a spell to make her tortoise grow bigger?