Academic libraries, university presses, and commercial ventures are embracing print-on-demand publishing to improve services as well as reduce costs. The concept dates to the early 1990s, but problems with the technology coupled with a lack of interest by libraries and book vendors hindered its popularity. Today, print-on-demand remains ideal for institutional repositories and digital collections, as well as for collection development. It is especially popular for users with print preferences. Many publishers and librarians believe print-on-demand holds more promise for libraries than electronic books. (Contains 38 notes.)