This book was very good in tackling subjects which usually get dealt with as a chapter in a book on the individuals. As someone who finds the period fascinating, it was academic enough not to be boring if you know a fair amount about the main characters, but not daunting if you dont. Alison Weir puts the chronology together well, and examines the four characters relationship with each other, how those relationships were manipulated or affected by those into whose care they were entrusted, and their motivations in the actions they took. She also takes a great deal of care in the detail - for example in trying to make a modern diagnosis of the ailments suffered by the characters, and in particular those suffered by Mary in her desire to bear an heir to the throne.
Thoroughly recommended.