Do you think he really does, is really eager to or has once agreed with a journalist question iyswim? Is it an approved biography cos that article didn't seem to imply a very friendly relationship between the biographer and the palace.
And having just read an article about the book, it looks like another dig up the dirt one.
Historians are going to have an incredible time in the future, trying to search the wheat from the chaff of the vast amount of media and learn about what happened in the C.20th and C.21st.