Presentation copy, signed by the author to Harris Colt, "The Military Bookman", who operated a shop devoted to military history. Comprehensive, authoratative bibliography on the subject. Martin Gordon served as consulting editor. Volume 1 includes listings related to units of specific states. Both include location information and indexes. This set has minimal soiling of the exterior. One corner slightly bumped (Volume 2). The interior of each is flawless. Volume 1: Pre-World War I, and Volume II: World War I to Present