This unique annotated directory of 900 jazz and blues landmarks covers 25 U.S. cities while summarizing many of the music's major and minor figures. For nightclub listings, though, it's a snapshot of an ephemeral world. A spot check revealed that some clubs listed for New York, Atlanta, and Chicago have since closed. (The author suggests calling ahead to verify information.) Perhaps most valuable to travelers will be the lists of local entertainment publications in each city. The historical notes might serve as a jazz/blues primer, but some entries are so compressed as to be potentially misleading. Although this guide will continue to date, it does provide pleasant armchair traveling. An optional selection.-- Paul Baker, CUNA Inc., Madison, Wis.