Halloween is certainly an occasion for late-night bashes, scary movie marathons, and hoarding Hershey bars. But it's also an opportunity for self expression. Inevitably, a costume is a reflection of who you are — or, at least, what you're obsessed with, what you find amusing, and what interests you. Sometimes, a costume can be a better expression of identity than everyday clothes.
If you're a book-lover, you've practically already done half the work of Halloween. You've followed characters over the course of a book or series, absorbing their perspective intimately. On Halloween, you can channel these beloved characters' looks and personalities.