If you are of Bucks County Quaker ancestry and your family's surname is listed among the 44 families in the book, you will find this book quite useful. My father's maternal line was listed here back to the 17th century in England starting with his name in 1925 at the age of 3, a very good start in tracing my genealogy. My introduction to it came from Ancestry.com which listed several of my recent ancestors as being in the book. Definitely of interest only to people from the 44 families whose genealogies are traced from 1925 back and then only to people who are interested in genealogy, as much of it is dry genealogical data ... birth, death and marriage dates, etc.