Mechanical Music, by Kevin McElhone. 32 Pages. Softbound. The sound of a street barrel piano or fairground organ may revive fond memories for those old enough to remember them or stir an interest in those too young to remember. This book will bring back these memories or stir an interest for anyone who reads it. It describes the history, development, usage, and fall from favor of these exotic instruments from pocket-sized snuff boxes to roll-playing pipe organs and everything else in between. Among its many highlights are the early black and white photos and detailed diagrams that complement the informative text. This nostalgic look at the past is sure to be appreciated by any music, antique and history buff. $8.95 (BK-0950)