[autarch]

In no particular order ...

I Am a Strange Loop by Douglas Hofstadter - strongly influenced my beliefs about how consciousness works

Godel, Escher, Bach by Douglas Hofstadter - made me think more deeply about so many topics

Animal Liberation by Peter Singer - made me both an animal advocacy activist and strongly influenced me towards a consequentialist moral

Neuropath by R. Scott Bakker - more on how consciousness works, this time through a work of fiction

The Dispossessed by Ursula K. LeGuin - strongly influenced my beliefs about political systems

The Selfish Gene by Richard Dawkins - changed how I thought about animal behavior and what living things do

Republic, Lost by Lawrence Lessig - strongly influenced my beliefs about US government

Manufacturing Consent by Herman & Chomsky - made me rethink my view of the media and news

[colordrops]

Yes! "Godel, Escher, Bach" and "The Mind's I" completely broke down the rigid models I had for how I perceive objects around me and my place in the world.

[austenallred]

Great list. Stealing the ones I haven't read.

[autarch]

I will warn you that reading Neuropath left me feeling depressed for a couple weeks. It's a great book, but the conclusions it might lead you to may not make you happy.

[alphapapa]

What kind of conclusions do you mean?

[autarch]

That humans are just machines and there's no such thing as free will. I already knew that to some degree before reading the book, but it frames it in a particularly bleak way.