This monograph intended for advanced music arts and history students (especially those of Bach) by Dyktstra (organ performance, U. of Texas at Austin) examines the written evaluations of Johann Sebastian Bach regarding the capabilities and construction of various organs available in his era. The author brings together scholarship and the relatively few organ registration examples attributed to Bach to asses the influence of the organs' constraints on his work and that of his contemporaries. Annotation ©2008 Book News, Inc., Portland, OR (booknews.com)