Peter F. Williams
Peter Williams (14 May 1937 – 20 March 2016) was an English musicologist, author, harpsichordist, organist, and professor.[1] Williams was considered one of the leading scholars on the organ and the life and works of Johann Sebastian Bach. -Wikipedia
Works (22)

J.S. BACH: A LIFE IN MUSIC

Figured bass accompaniment
1970

The European organ, 1450-1850
1966

The organ music of J.S. Bach
1978

Bach organ music
1972

The European organ, 1450-1850

The Organ Music of J. S. Bach (Cambridge Studies in Music)

Perspectives on Mozart performance

Bach

LIFE OF BACH

The Organ Music of J. S. Bach

ORGAN MUSIC OF J.S. BACH

The organ in western culture, 750-1250
1993

Organ
1988

The Organ in Western Culture, 7501250

A new history of the organ from the Greeks to the present day
1980

Bach

Bach, Handel, Scarlatti 1685-1985

The Life of Bach (Musical Lives)

Bach, Handel, Scarlatti, tercentenary essays

Perspectives on Mozart Performance

Bach und die Orgel