This is an irritating book, in that it should be much better than it is. Nigel Jones is a good writer who has assembled many interesting facts, and who can create deft pen-portraits of many individuals. I think he relies too much on Tudor accounts of the Richard III affair - (would he regard Arthur Scargill as an impeccable and unbiased source on Margaret Thatcher, I wonder?) - and some of the conclusions he draws may be wrong (Pepys may not have been currying favour by escorting his superior's wife to the Tower - they were after all cousins) but are at least arguable.
Unfortunately there are far too many errors in this book as currently presented; for example, Victoria ascended the throne in 1837, not 1838, the date at one point switches from 1674 to 1664, 1513 should obviously be 1613 (in the Overbury section) and the King in 1436 was Henry VI, not Henry V. Perhaps worst of all, the book shows a complete lack of understanding of the peerage. Duke and Earl are not synonymous, neither are Duchess and Countess. Characters change their name and rank frequently; for example, Henry Grey, Duke of Suffolk, suddenly becomes Earl of Suffolk, his daughter Catherine becomes Katherine before reverting to Catherine, and Margaret Plantagenet Pole, niece of Edward IV and Richard III, is twice called Duchess of Salisbury and twice called by her real title, Countess of Salisbury.
These errors cannot but detract from this book; if you know some things you're being told are wrong, how can you believe others? I'd urge Nigel Jones to correct this book before the paperback edition and make it as good as it deserves to be.