Selection of adult books for teen-age readers should be based on three pertinent factors: (1) interests, ideals, and aspirations of adolescents, (2) acquaintance with the best books of the past and present; and (3) availability of adequate funds. Literature on early book lists generally failed to appeal to young readers. Today, many current and varied guidelines for book selection are provided by books and articles as well as by the Bill of Rights of the American Library Association. A limited survey of librarians and teachers indicated that their criteria for book selection included the excellence of writing and the "reality" in the book. Studies of reading interests of teen-agers revealed that young adults are concerned with the individual, with social problems and responsibility, with contemporary affairs, both national and international, and with the movement into adult life. (A list of book selection references is included.) (JM)