Andrew Morton is "already at work" on a book "with a team of researchers" on the forthcoming marriage of Prince William of Wales and Miss Catherine Middleton. William and Kate will be published by Michael O'Mara.
The book will be published within days of the wedding and will be "both a celebration and a memento" of the ceremony. Photographs of the wedding will be included in the book.
It is unlikely that Prince William will welcome Morton's attention, as it was Morton, with Diana's "covert assistance" who was the author of Diana: Her True Story.
Clarence House had not comment other than to say it was "not a book that has been endorsed."