Geography, Realms, Regions, and Concepts is by Peter Muller and the great Harm de Blij, author of Catholicgauze's favorite Why Geography Matters. The book breaks apart the earth into common-sense regions. Each region is described by its physical, cultural, political, economic, urban, and historic factors. Besides the excellently and clearly written standard fair the authors offer field notes and other personal observations with the intelligence and humor one expects from de Blij. In short: this is an excellent regional geography book.
The only problem with the text is that the latest edition costs about 110 dollars. However, the previous edition from 2003 is only about five dollars. So if you want a quick, easy, and cheap way to learn regional geography then Geography, Realms, Regions, and Concepts is the way to go.