I just got done reading Adam's Curse by Bryan Sykes. Sykes is a pioneer in DNA testing for genealogy among other uses. While Adam's Curse can get a bit tedious it is the best and easiest to understand explanation of Y DNA testing. There are some interesting things about historical events too. His Seven Daughters of Eve is about MtDNA testing and a really good book too. I recommend both. I have just ordered the one on Vikings and Celts. We will see what that tells us about those early English settlers. Our Bedfordshire Bunkers have Viking ancestors while our Devon Bunkers come from a group that settled much earlier in England. Bette