I've found Pippi Longstocking.
The edition below, illustrated by Lauren Child is the one Calvin poured through a few days ago.
This is a quote from Calvin: "It was really funny, Mom. Pippi had awesome adventures. I wish I had a monkey." Pippi has no parents and she has a monkey. There are pirates. There are booby traps. Her two friends are a brother and a sister.
When you type in Pippi Longstocking on Amazon, Matilda by Roald Dahl also comes up, and most kids, boy or girl love Matilda.
Thanksgiving weekend's a great time to pull this puppy out and start reading it aloud. Chances are you'll have a reader or two sneaking off with it to read it on their own...