For your Book party theme, here is a game idea that can be altered to fit the Book party theme.
Check out Book
Party Games for more free party games. A book party is great for kids or adults to add an educational flair to any celebration.
Charades book party game: Have props available, for a charades book party games, and print names of books and well known book characters on slips of paper. Let guests draw a slip of paper and act out charades until the book is guessed. If you see your guests are having trouble, consider having the book handy so they can take a peek! Another alternative would be to have a list of book party games possible answers, so everyone can take turns choosing an answer. That way, everyone is sure to get a chance to win. Just keep Book party games simple with questions that everyone will know like "Harry Potter is an_______."