.Norman Heard's Bookman's Guide to Americana has been a standard reference in the antiquarian book trade for almost four decades. For booksellers, collectors, and librarians needing a quick reference source for out-of-print and rare books in the comprehensive field of Americana, it has proven invaluable. The new eleventh edition, now compiled by Lee Shiflett, contains price quotations for approximately 10,000 titles relating to the history, culture, and literature of the Americas. The prices quoted are derived from booksellers' catalogs issued since the tenth edition of the Guide (Heard and Hamsa, 1986).