Daniel Kahneman’s book on Thinking Fast and Slow is a very readable, non-technical purview of our mind’s often systematic thinking errors and how they are mainly due to “errors in the machinery of cognition (ie. biases, heuristics) rather than to the corruption of thought by emotion.”  Terrific book on understanding your own mental systems, as well as a “must-read” at the CIA.  You can get it on Amazon.