#1 Books on education and child development, as well as "Never Too Late: My Musical Life Story," are by John Caldwell Holt (1923-85).
#2 Books on nature, hunting, and fishing are by John Holt (1951- )
#3 John M. Holt, author of UML for systems ehgineering
#4 John Holt; Gentleman formerly of Greys-Inn
#5 John Holt, musician
#6 Books on Buddhism are by John Clifford Holt (1948-)
#8 Holt, John, 1743-1801
#9 John Holt (1943), Thriller author
#10 John "Terry" Holt
Do not combine this author with either John Caldwell Holt or John R. Holt.