How Children Learn (Classics in Child Development)
How Children Fail (Classics in Child Development)
Learning All the Time
Teach Your Own: The John Holt Book of Homeschooling
The complete text of The Underground History of American Education by John Taylor Gatto is available on his website.
There is a lot of other interesting material about education on the main section of his site: http://www.johntaylorgatto.com/
Other books by him are available from Amazon: