One book that had a major influence on my political development was Barry Goldwater's Conscience of a Conservative.
In fact, Goldwater was probably the most principled American politician of the last century and the man most responsible for giving life to conservative politics.
So it's interesting to note that a documentary is coming out which apparently claims Goldwater was actually a "kind of liberal"!!
The documentary's producer, who also happens to be Goldwater's grandaughter, notes that he favored abortion rights and allowing gays in the military, and refused to attend President Nixon's funeral because he "cheated" the country.
Well yes that does make Goldwater a "kind of liberal" but they are usually called libertarians.