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. Stockpile these versatile volumes with today’s Groupon: for $10, you get $20 worth of books and merchandise at City Lights Bookshop. City Lights Bookshop stocks its shelves with new, used and antique books, as well as movies, music, and pop culture memorabilia on two floors full of snaking labyrinthine aisles. As literary and philosophical tomes ($4.99+) tease brains, vinyl records ($3.99+) nap in their sleeves and self-help books ($4.99+) repeat calming mantras to themselves during feuds between graphic novels' words and illustrations ($9.99+). Nestled beside recently published fiction such as Chuck Palahniuk's Tell All ($9.99), pages in used classic works such as Anais Nin's Winter of Artifice ($9.99) and Walt Whitman's epic poem Leaves of Grass ($5.99), await scribbled marginalia and dog-ears from newly captivated readers. Bookworms can discover an artist's insightful musings in The Philosophy of Andy Warhol ($11.99) or read through Kurt Vonnegut's Breakfast of Champions ($6.99) after soaking it in milk fails to make it taste like cereal.