Daniel Kahneman's "Thinking Fast and Slow" is one of the best books I've read in a long time.
"It's not a case of: 'Read this book and then you'll think differently. I've written this book, and I don't think differently" Daniel Kahneman
I can't say it's changed my life either! But if Kahneman's book is not destined to change the world it does at least help us to explain some of the perplexing aspets of our (human) behaviour.