"Why We Get Fat" is a fascinating read and a very informative book written by Gary Taubes. Taubes, an investigative journalist, in his book, "stand the received wisdom about diet and exercise on its head". Taubes goes back through the history of the study of obesity and finds that prior to WWII, scientists had a very different view on what caused obesity; he goes through study after study, but finds no support for the current theory of cause for obesity.