Producer of price guides (in the "Official Price Guide" series) and reference books for music collectibles. General descriptions of each volume.

Comprehensive guide to recordings in every genre. Cross-indexed source of reviews, essays, and ratings; all available online, on in-store kiosks, and in print form. Uses submissions from readers.

Longtime publisher (over 50 years) of directories of recorded music for retail stores; their data is now available for purchase to place on other websites and in-store kiosks.

Information from Billboard magazine's major charts with complete chart data on every recording ever charted. Short descriptions and sample pages from this large line of books.

Over 30 music guidebook titles; features online versions of their Rock, World, and Classical guides.

CD-ROM discography RockRom 8, and book Rock Record 7, with 500,000 records, over a million tracks and musicians. Free sofwared demo download.

Publisher of guides to bootleg records and CDs.

Brief description of the guidebook to classical music.

Official site of Trouser Press magazine (1974-1984) and the Trouser Press Record Guides. Reviews and discographies from five editions of the guidebook.

Publisher of several record and CD collecting related books, including price guides.