Author Gerald N. Callahan is a professor at Colorado State University. Colorado has long been my home, so I was interested in his recent book River Odyssey, in which he discusses his experiences and thoughts about life. Interesting, for example, is his rueful confession, "I drink too much . . . I eat like myocardial infarctions and colon cancer don't kill middle-aged men, and every morning I swear I'll change, but nothing ever changes."