Ingram Publisher Services has added Köehler Books and Linden Publishing to its list of clients.

Founded in 1980, Linden specializes in original nonfiction, published under three imprints -- Linden Publishing, Craven Street Books, and Quill Driver Books. Köehler publishes fiction, as well as self-help nonfiction titles. Ingram will handle sales and distribution in the U.S. and Canada for Köehler and Linden, in addition to supporting both publishers with its CoreSource and MyiLibrary platforms for e-book distribution and Lightning Source for on-demand book manufacturing.