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
Sure, it's a little mysterious, but there's nothing particularly tough about this one. Actually, it's pretty good beach reading. (Just be careful: there will probably be a few "gasp!" moments – you might get some strange looks from nearby sunbathers.)