A list of books on the big ideas of psychology
Yeah, it's too difficult to say ALL the books, because there are thousands.  Some good ones I've come across lately are "Thinking Fast and Slow" by Kahneman.  His ideas have been enormously influential, especially since he won the Nobel Prize, and it's easy to read.

Another book I've been reading lately is "The Evolution of Childhood" by Melvin Konner.  It's not really psychology, more behavioral biology and evolution, but it's relevant to psychology and interesting.

I'll come back and post more as I think of them.