Established in 1964, "Bookman's Price Index" is an index to rare and antiquarian books offered for sale in the catalogs of 100-200 book dealers in the U.S., Canada, and the British Isles. The number of titles listed in each volume is approximately 15,000; in the course of a year some 50-60,000 books are described.

Pirates Through the Ages Reference Library explores the history of piracy from ancient times to the present day. The set includes Almanac, Biographies and Primary Sources volumes, covering topics including piracy in antiquity and the Middle Ages; the golden age of piracy in the Caribbean; female pirates; the pirate code of conduct and pirate slang; strongholds and hideouts; ships, weaponry, and sea battles; pirates in literature and film, modern maritime piracy; and more. The set includes standard U X L Reference Library features such as a chronology, glossary, research and activity ideas, and more. Also includes a comprehensive index.