Ask for book donations in exchange for services or products. Contact family and friends. Ask them to participate in this endeavor, and to forward the message to others. Send a message to your existing customer base, and ask if they would be willing to pay with books instead of money.
Ask local schools to hold book drives. Ask that that school collect books from students, parents and teachers. The school board typically requires that you speak to the board, the PTA president and the principal at each participating school.
Request new book donations in lieu of presents on special occasions. Request books instead of presents from people that usually give you gifts on birthdays or Christmas.
Contact local book stores and ask for donations. Bookstores occasionally donate a few books to libraries. Offer to pick up the books, eliminating shipping costs.
Call or email family, friends and local businesses to ask for monetary donations for books.