I don't have any. Reading and reflecting gradually changed me as a person by teaching me how to think more ciritcally and it opened my mind to new ways of thinking, but no epiphanies, major lifestyle changes or changes in my perception resulted from reading specific books.
'What is Literature?' by Sartre made me feel more committed to living mindfully, but it was just one in a series of books. By itself, it didn't influence me much.
Did you ever feel changed by reading a philosophy or psychology book?
"Let your passion for life burn through every obstacle."
A neglected American thinker who changed my life was Ralph Waldo Emerson. I recommend the American library edition of all his essays. He was very influential on nietzsche too I'd like to add.
The VALIS trilogy by Philip K Dick really changed me, it's fiction, but both VALIS and the Transmigration of Timothy Archer are pretty close to autobiographical. Very heavy philosophy, might have you teetering over the edge of madness, but I liked it
Thus Spoke Zarathustra by Nietzsche is a must read.
~The air tastes just like you, it's the smell of June
A sensory shock that jolts my spirit, I slowly swallow you
A spray of little droplets, a fragrance so refined
The spirit of nostalgia is passing me by~
An author that I find intriguing is Jorge Luis Borges who wrote a collection of philosophical short-stories. The first one I read was titled "The Library of Babel". The story is about a universe that is filled with a near-infinite number of books. The content of the books are random - so most are gibberish, but at the same time the library does contain all intelligible books that have ever been written and will ever be written (but finding those books is almost impossible).
Both Quine and Dennett have commented on this story. Quine (Quiddities p224) remarks that "The entire and ultimate truth about everything is printed in full in that library, after all, insofar as it can be put in words at all." He also argues that the whole library can be fit into just two books: one containing a dot, the other a dash. You flip back and forth between these two, producing an endless supply of morse code.
Dennett (Darwin's Dangerous Idea, p107ff) creates his own variation of the story which he calls "The Library of Mendel". In this library all possible DNA sequences are generated. Hence all possible kinds of living things are in this one library. Again, most of them will be gibberish sequences which cannot produce life.
.. After reading this story I'm not sure if it gave me an entirely new way of thinking. But the impact that it had on me was, I guess, a strange sense of how randomness can lead to knowledge.
^^^ I forgot to mention that Borges' stories were published in a book called Labyrinths.
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Another text that has changed my outlook is by Peter Wessel Zapffe, an author who produced "philosophical pessimism" [so says Wikipedia]. I have not been able to get a hold of his books - but fortunately one of his essays (which summarises his work) is available:
The moral being that humans are able to reflect on their own existence - but only because they have over-evolved, their minds becoming too much to bear, and this leads to madness.
