Buy-ology is summary of a series of fMRI (Functional Magnetic Resonance Imaging) tests designed to test the effectiveness of modern marketing techniques, as well as some traditional marketing axioms. He also tackles some interesting topics like the similarities between brands and religion, subliminal advertising, and why scents may become the logos of the future.
Jonah Lehrer’s How We Decide is a dissection of the unconscious systems we use to make decisions. He takes us through the impossibly complex system of rewards that form our emotional decision making system and ultimately make us supremely efficient decision makers, even if it seems like we make bad decisions all the time. Awareness (I won’t say understanding) of these systems is incredibly enlightening for designers.