Book by Dan Ariely and Jeff Kreisler that explores the various ways in which humans make irrational decisions when it comes to money. The authors, using numerous anecdotes and research studies, explain how we overvalue things, succumb to temptation, and rely on mental shortcuts when managing our finances. They explore specific psychological phenomena like anchoring, relativity, and the endowment effect to show why we might make a seemingly illogical decision. The text suggests that while these behaviors are often detrimental, understanding them can lead to better financial choices.