The Mysterious Bookshop is an independent bookstore and publisher specializing in mystery fiction, located in New York City. It is one of the oldest mystery bookstores in the U.S. In addition to housing its own imprint, the shop contains the offices of both the Mysterious Press, distributed by Grove Atlantic, and MysteriousPress.com, an e-book imprint distributed by Open Road Media. The store and its various publishing enterprises are owned and operated by editor and publisher Otto Penzler; its inventory consists of new and rare titles in detective fiction, crime fiction, spy fiction, thrillers, and various other mystery fiction subgenres. The store also features the largest collection of Sherlock Holmes titles and Sherlockiana in the world, as well as a considerable collection.