A year after ''Fifty Shades of Grey'' overwhelmed best-seller lists, book buyers were seeking different kinds of thrills.
Dan Brown 's latest Robert Langdon caper, ''Inferno,'' was Amazon.com's No. 1 seller for 2013, the online retailer announced Monday. Khaled Hosseini was second with ''And the Mountains Echoed.'' The best-sellers for kids and teens were Veronica Roth's ''Allegiant'' and Rick Riordan's ''The Houses of Hades.''
Other major hits on Amazon.com were ''The Cuckoo's Calling,'' a crime story J.K. Rowling wrote under the pseudonym Robert Galbraith, and John Grisham's ''Sycamore Row.'' Sylvia Day's ''Entwined With You'' was one of the few works of erotic fiction to place high on Amazon's list. Nonfiction favorites included Sheryl Sandberg's ''Lean In'' and ''Things That Matter,'' an anthology of essays by conservative columnist Charles Krauthammer.