Here are books that I read as a young child which effected my thinking.
Silent Spring by Rachel Carson
Bury My Heart at Wounded Knee by Dee Brown
The Teachings of Don Juan: A Yaqui Way of Knowledge, A Separate Reality and Journey to Ixtlan by Carlos Castaneda
The Electric Kool-Aid Acid Test by Thomas Wolf
Black Elk Speaks by John Neihardt
Stranger in a Strange Land by Robert Heinlein
The Hobbit, The Lord of the Rings, and The Silmarillion by J.R.R. Tolkien(read 6 times)