The Booksellers Print-to-Order (PTO) Publishing Program -- from the American Booksellers Association and Applewood Books -- has launched a beta version of its participating booksellers' online portal, the latest development in the initiative's rollout. The program, open to any ABA member in good standing, gives independent booksellers the ability to publish any titles in the public domain, or those whose rights have been secured from the author, and to sell them at margins from 50 to 75 percent.