I have been doing genealogy for 29 years now. I started with my grandfather's research that he gathered for 25 years himself. That information has been published in a book of the German Strathman family from 1650-today. We are from Holdorf Germany.
My work with the Detroit Firefighters has led to a book "Detroit Firefighters 1865-2005". (the book is now out of print. 2010 but is in the Detroit library system for check out)