e-books. Just announced for 99¢ is Green Monster by Rick Shefchik featuring PI Sam Sam Skarda. It's a Boston Red Sox story—just in time for spring training. Kobo, Barnes & Noble, Apple, or Amazon.
Many other titles are available for 99¢ or FREE at the Poisoned Pen website.
While you're browsing around the site, check out Brooklyn Bones by Triss Stein. It's a great mystery—especially if you like your murder early in the story. A skeleton is found while remodeling a Park Slope brownstone in the first few pages. It's just out—in several formats. I highly recommend it, even at full price!