Ironically, although this was a more exciting story with more novel developments and better pacing than many other Pitt novels, I found myself enjoying it slightly less than the previous one, Farriers' Lane. The premise was excellent and the story less reliant on repetition, but I had three problems with it: the strange but unremarked-upon behavior of the culprit, the over-the-top sympathy for Carvell, and the unfolding of the ending.
Thanks to spectacularly bad luck, I managed to accidentally open the book, when I was about a quarter in, to a page near the end where I glimpsed, "But why did you kill [victim]?" right beside a character's name - so, unfortunately, I had that spoiled for me. Nevertheless, I'm sure I would have guessed the killer because their behavior is quite bizarre, requiring at least a few follow-up questions. Since that never happens, it stuck out.
Several previous Pitt novels have dealt with the subject of homosexuality in Victorian England. I have generally praised this handling because it properly illustrates the extreme stigma held by society at the time, without letting the reader forget that those afflicted by it are still human beings (a balance that many people should strive to find today). In The Hyde Park Headsman, however, I felt that Thomas's sympathy for Carvell went too far. Perhaps it was an uncommonly clumsy attempt to balance several villainous same sex-attracted characters from previous novels, but it didn't ring true for me - in today's terms, it would be like saying, "Sure, that guy molests dogs on the regular, but he truly loved that dog who died and I really don't think he's the killer!" An emotionally mature person, like Thomas has been proven to be time and again, can hold a belief in someone's innocence alongside acknowledgement of a behavior that was, at the time, generally considered as disgusting as canine molestation. I couldn't help but wonder if Anne Perry or the publisher's hand had been forced by some politically correct taskmaster.
Finally, the ending - why are they always so abrupt? The confrontation with the killer verged on melodrama with the way it transpired and the complete lack of explanation as to how such insanity had been mostly concealed. Then, oddly, the book copied almost precisely the ending developments from Farriers' Lane, which diminished their effectiveness. And again, we're left with no closure - just a hasty "all's well that ends well!"
Despite my complaints, I still enjoyed this book very much. The character portraits are as psychologically complex as always, the setting is extremely vivid and detailed, and immersing oneself in the world is not just easy, but fun. When I call an Anne Perry novel subpar, I only mean in relation to other Anne Perry novels. They're all leagues ahead of most other literature, and I can't wait to read the further adventures of Thomas, Charlotte, and their motley little crew.