The Book Thing - Laura Lippman

A thief targets a local bookstore and it will take a bibliophile PI to save the shop.
Tess Monaghan wants to like the Children's Bookstore. It's bright, cozy, and packed with the kinds of books that she is dying for her daughter to fall in love with. But no matter how badly she wants to support this adorable local business, the owner's attitude stops her in her tracks. What kind of children's bookseller hates children? What's eating Octavia, the grouchy owner, is more than the pressures of running a small business. Each Saturday, someone steals a stack of her priciest, most beautiful children's books, and the expense threatens to force her fledgling store out of business. Luckily, Tess is more than a book lover—she's a private investigator who doesn't mind working pro bono to help out an independent bookshop. Her simple act of kindness will make Octavia smile for the first time in months—and uncover a crime more suitable for the mystery aisle than the children's section.
The Bibliomysteries are a series of short tales about deadly books, by top mystery authors.