This book is about the Jacob Harlan Mertz family of Boonesboro, Maryland. It includes all of his ancestors and descendents that I have been able to find. Some of the families in that area still use the surname Martz. This was used by nearly all the families, mostly before the Civil War. Some changed it to Mertz shortly after that. I have also included a list of men and women who married into the Mertz or Martz families in that area. There is some information on the family when they were in Frederick County, Maryland also. The book is partially indexed so you may have to search to find the information you are seeking.If you have any ancestors you can trace to this Mertz/ Martz family this book might appeal to you.