Boyd, Malcolm. Oxford Composer Companions: J. S. Bach. New York: Oxford University Press, 1999.
A dictionary deals with matters related to J. S. Bach, his era, and his music. Useful for a research on J. S. Bach and his music.
Deals exclusively with people, compositions, and any other terms related to J. S. Bach and his music.
Standard dictionary format. Includes bibliography of related research at the end of each entry. Gray scale pictures and illustrations interspersed throughout. Appendices include a list of Bach's works, text incipits, chronologies, and glossary.
Bartlett, Clifford. Early Music Review no. 57 (February 2000): 5-6. Cole, Warwick. The Musical Times 140 (Fall 1999): 72-73.