The book is full of new and interesting information with a comprehensive and invaluable genealogy. Well researched and well written but has quite a few typos which get annoying (e.g. every "such" or "succession" is written as "suc.h" or "suc.cession"). In the genealogy there are a few typos as well (e.g.Penelope Thompson is said to have been born in 1996 three days before the birth of her daughter). Despite this it is a book that anyone interested in this subject must have.