Mistakes Were Made (but Not by Me): Why We Justify Foolish Beliefs, Bad Decisions, and Hurtful Acts is a clever book that demonstrates our biases and seeks to explain them.
In the first half of the book, the authors dig deep into a few human traits such as cognitive dissonance. Why does it happen? How does our brain reconcile it?
In the second half, the authors apply these lessons to some real-life problems. How can we become better spouses? How can we reduce crime and avoid wars?
If you're interested in these topics, I recommend the book.