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. Arm yourself with the power of words with today's Groupon: for $9, you get $20 worth of new and used books and more at Rodney's Bookstore, located in Central Square in Cambridge.

Spanning two floors and 6,000 square feet, Rodney's Bookstore houses more than 100,000 new and used titles, including rare and out-of-print tomes. With the selection ranging from used textbooks and cookbooks, to children's picture books and popular fiction, the store promises a tactile readable for any interest ($3–$35 for used books). Large sections on art and architecture will provide budding designers with ample resources to construct the world's first fully recyclable house, while retro decorators and nostalgic robber barons can peruse the catalog of more than 1,000 vintage advertising posters ($19.95 for a 20"x30" image).

Piled high with softcovers, hardcovers, and squishycovers, Rodney's welcomes customers to wander its book-crammed aisles, uncovering surprising treasures, or a long-coveted copy of Van Helsing: The Book; The Movie; The Book. Rodney's also accepts trades of gently used books in exchange for store credit, allowing you to add more bang to your Groupon before making a purchase and meandering to one of four coffee shops located within a one-block radius.