George III: The Life and Reign of Britain's Most Misunderstood Monarch: Andrew Roberts (author) Hardback 800 Pages / Published: 07/10/2021 link
"Roberts' magisterial, revisionist biography of the controversial George III debunks much of the popular discourse about the monarch's incompetence and the nature of his mental state, painting a persuasive portrait of a shrewd and courageous leader." Also currently being read in abridged form on BBC Radio 4.
For a minute there I thought you were referring to Professor Roberts. I have to admit to a not inconsiderable disappointment.