As Serious As Your Life by Val Wilmer
Classic, seminal work on free jazz
Free Jazz by Ekkehard Jost
Covers ten free jazz artists from the 1960s and 1970s
Free Jazz: A Research and Information Guide by Jeff Schwartz
Wide-ranging research guide on free jazz
Free Jazz: A Collective Improvisation by Ornette Coleman
Album that helped define the genre
Holy Ghost: The Life and Death of Free Jazz Pioneer Albert Ayler by Richard Koloda
Comprehensive biography on Ayler
Unit Structures by Cecil Taylor
Album that helped define the genre
A Power Stronger Than Itself: The AACM and American Experimental Music by George E. Lewis
A history of the Association for the Advancement of Creative Musicians
Free Jazz Films
Free Jazz films available on The Criterion Channel
Machine Gun by Peter Brötzmann Octet
Classic album that helped define the genre
Forces in Motion: Anthony Braxton and the Meta-reality of Creative Music by Graham Lock
Follows Braxton's quartet on a 1985 tour of England and explores his views on many subjects
Black Music by LeRoi Jones / Amiri Baraka
Classic book on free jazz and other artists
Sun Ra Bandcamp
A vast collection of Sun Ra albums
Carnegie Hall Timeline of African American Music
Free Jazz/Avant-Garde page from illustrated historical account
Out to Lunch! by Eric Dolphy
A classic album by a free jazz pioneer
Free Jazz Music: Breaking Boundaries Through Pure Expression
Another take on free jazz history
Free Jazz: A Short History Of The Jazz Sub-Genre by Charles Waring
A brief historical guide on free jazz
The Free Jazz Collective
Reviews of free jazz and improvised music
The Freedom Principle: Jazz After 1958 by John Litweiler
A historical exploration of free jazz with some strong opinions