Over the course of the last several years, university presses have experimented in a variety of ways with OA book publishing. Programs such as Knowledge Unlatched, TOME, and NEH/Mellon's backlist digitization initiative have provided the financial resources to underwrite experimentation. Darrin Pratt, director of University Press of Colorado, will discuss his own press's OA results and offer his perspective on the future of OA in book publishing.