The worldwide interest in automatic organs is larger now than ever before. From delicate and musically sublime little organs contained in musical clocks of the type Mozart and Haydn composed music for, through to enormous and loud dancehall and street organs, the genre exists to please everybody and to suit all tastes. This comprehensive, yet delightful and easy-to-read, reference unlocks the mysteries of mechanical versions of the King of Instruments and its smaller counterparts. 79 color and 538 black and white photos display examples from 18 chapters and six Appendices that specify how automatic pipe organs work, Italian water garden organs, barrel organs, orchestrions, and street and showground organs, as well as automatic organs of the 21st century and more. The list of makers, distributors, and inventors the world over has never been available before. Now musicians, instrument collectors, owners, museums, and grateful audiences can explore the how, where, and why of these charming entertainers. The valuation and price guide includes a thoughtful discussion of the market and its variables.