It's pretty hard to say why, but let me give it a shot: the way his writing conveys his affection for his near family and his ancestors without losing hissense of humour about them. (Ian Frazier started out as a humor writer.) His beautiful descriptionsof the countryside he travels through, country you might otherwise think was much worth looking at. His wonderful details about his family history make you feel like everyone's family is important.
Since I first read this book, I have developed a true genealogy fixation, trying to recapture thefeeling Frazier invokes in this wonderful book. I wish he would write more.
And I just realized thisis the same guy who wrote Coyote vs. Acme. The guy's got range.