I just heard about this this week, from a coworker who heard about it at PLA - Findaway World (the company who makes Playaways) has a free app that uses audiobooks to test your book knowledge. It's called Bookopotamus.
It's pretty neat - it's multiple choice trivia, with book titles as your options. Each question is a quote from an audiobook (which the app reads aloud), and then you tap the title of the book that the quote is from. The earlier you answer the higher you score:
We are excited to introduce you to Bookopotamus, our new audiobook trivia app! When you download the app and play, we’ll donate Playaways to children’s literacy through First Book!