$20 Superpack: Mystery Surprise

Does mystery intrigue you? Are great deals your cup o' tea? Well, this superpack has both. We'll send you $50 worth of books from our secret "under the stairs" selection (as in the hundreds of boxes of books that physically hold up our loft) with shadowy vibes. Anyone know where we can get some flat black wrapping paper and a string of clues? 

*Note: This is a pack of mostly nonfiction, and does not contain any detective novels; the mystery is in what books you'll get, not within the pages themselves!