This comes from Charlie Higson, who has written lots of books, but is probably still best known for his role in the 1990s TV comedy sketch series, The Fast Show. Put simply, it's the story of all England's kings and queens from the time of William the Conqueror and the Norman Conquest of 1066, across all the ensuing centuries, right up to the current reign of Charles III in the 2020s. Nearly a thousand years of royal history is thus condensed into one highly readable volume.
The title refers to the beginning of a well-known poem which starts: "Willie Willie Harry Stee, Harry Dick John Harry three..." designed to help people remember the full list of monarchs (the CCBC show, Horrible Histories has produced a similar list in song form). Higson, in fact, recently fronted a podcast series on this subject, so my only mild warning about this is if you've already listened to that (and I haven't done so), reading this book will undoubtedly inspire a strong sense of déjà vu.
Otherwise, this is perfect reading for any casual reader wishing to top up their basic knowledge of the history of the monarchy. We get the bad (the malevolent and generally hopeless King John), the mad (notably Henry VI and George III) and the dangerous to know (one thinks of Henry VIII, at this point). We learn about the Anarchy, the Black Death and the Crusades. Although primarily about our heads of state, Higson examines whatever else was going on in society at the time, when relevant. It is not an academic book and is often quite funny but is not an out-and-out comedy: its a full and proper history. It is similar in tone to David Mitchell's Unruly (2023), though has a later start and end point.
Highly recommended.