A full bookshelf not only provides a conversation piece for guests, but also lessens the odds they'll pull out the tome that triggers the trapdoor to your shrine to Don Knotts. Build up book collections and safeguard secrets with today's Groupon: for $10, you get $20 worth of new and used books at Book'em Mysteries in South Pasadena.
The resident sleuths at Book'em Mysteries tend to a grand archive of new and used crime and mystery fiction. The friendly staff can assign new case files to eager gumshoes in hardcover ($25–$30) or paperback ($6.95–$15.95) from a wide lineup of authors and presses. Meanwhile, used books ($2–$8) line the shelves with only trace evidence of their previous owners. Readers looking to go further in-depth with their investigations can join one of the store's reading discussion groups, attend the frequent book signings, or search for book ideas in their neighbor's trash.