Education books I've read

Dumbing us Down by John Gatto Taylor
How Children Fail by John Holt
A Thomas Jefferson Education by Oliver Van DeMille
An Unschooling Life by Rue Kream
The Unschooling Handbook by Mary Griffith

And the original book that led me into looking at homeschooling (and then stumbling upon unschooling) was Unconditional Parenting by Alfie Kohn.