For me it was 1.Influence: http://www.amazon.com/Influence-Psychology-Persuasion-Robert-Cialdini/dp/006124189X/ref=sr_1_1?ie=UTF8&qid=1418061288&sr=8-1&keyword

For me it was 1.Influence: http://www.amazon.com/Influence-Psychology-Persuasion-Robert-Cialdini/dp/006124189X/ref=sr_1_1?ie=UTF8&qid=1418061288&sr=8-1&keywords=influence http://www.amazon.com/Influence-Psychology-Persuasion-Robert... It talks about how the brain has certain preprogrammed sequences for situations. 2.Predictably Irrational http://www.amazon.com/Predictably-Irrational-Hidden-Forces-Decisions-ebook/dp/B002C949KE/ref=sr_1_1?ie=UTF8&qid=1418061376&sr=8-1&keywords=predictably+irrational http://www.amazon.com/Predictably-Irrational-Hidden-Forces-D... Again about the hidden mechanisms with which we make decisions and our reptile brain.