This is in no particular order:
Free to Learn By Peter Grey
Deschooling our Lives Edited By Matt Hern
Deschooling Society by Ivan Illich
The Art of Self Directed Learning and others Blake Boles
Teenage Liberation Handbook: How to Quit School and Get a Real Life and Education" Grace Llewellyn
How Children Fail by John Holt
Dumbing Us Down and others John Taylor Gotto
Unconditional Parenting and others By Alfie Kohn
Authors who have Several Realted Books
Sandra Dodd
Pam Laricchia
http://imhomeschooling.com/unschooled-kerry-mcdonald/