We've got your back. With the Tough-O-Meter, you'll know whether to bring extra layers or Swiss army knives as you summit the literary mountain. (10 = Toughest)
(2) Sea Level
Superhero stories might be cool, but they're not exactly tough to follow. We love us some good old-fashioned battles of good against evil (or in this case, squirrel against mom), but we don't think anything about Flora and Ulysses will trip you up. Sure, there're some words—like malfeasance or capacious—that might make you stumble in a couple places, but aside from that, we're got a typical superhero tale of an unlikely guy (ahem, squirrel) learning how to use his one-of-a-kind magical powers.