Besides being a useful replacement for a missing bed-frame leg, a stack of books also makes you look smarter and can stop a crossbow arrow if you're being targeted by any misinformed vampire slayers. Stock up on all-purpose entertainment with today’s Groupon: for $10, you get $20 worth of books, greeting cards, and more at Mostly Books.

Mostly Books supplements its shelved selection of thousands of new and used books with unique greeting cards, T-shirts, and gaggles of gifts. Paperbacks such as All the Pretty Horses ($15) and A Game of Thrones ($8.99) propel imaginations into fantastic realms of literature, and hardcover word-hoards such as the The Kane Chronicles ($18.99) await excavation by the eyes of eager readers. Entertain tots with elephant adventures in We Are in a Book! ($8.99/hardcover), which tells the tale of piggy and pachyderm pals.

Elsewhere, Mostly Books' inventory teaches unschooled sternums new turns of phrase with entertaining T-shirts and ends the quests of customers searching for ways to express mixed emotions with assorted greeting cards.