
There's no mystery (heh) why I checked out this book at Portsmouth (NH) Public Library: it won the 2025 Edgar Award for "Best Novel". And (for once) I agree with the Mystery Writers of America: it's pretty good.
But while I was verifying that, I came across this abject apology:
Mystery Writers of America wishes to clarify the use of images of Humphrey Bogart and Edgar Allan Poe in a video shown at our recent Edgar Awards. Member authors wrote the script, but AI tools were used to animate the images of Bogart and Poe. Such use is inconsistent with our otherwise staunch support of our members’ fight against unauthorized use and potential for piracy of their work through AI. We apologize and have taken steps to assure this won’t occur in the future.
I get that some writers are upset with their works being used to train AIs. They are fine with people reading their books; they're unhappy with non-people reading their books. Or something.
Anyway: the main character here is British police detective ("DI" or "Detective Inspector") Caius Beauchamp. He and his team work on two unlikely cases: the more recent one being the discovery of that lady whose hand appears on the cover, drowned in the Thames; she's connected to a long-ago embezzlement of a company's pension fund.
And there's the matter of another dead body that shows up at a play Caius is attending; the victim appears to have been obsessed with the long-ago disappearance of a teen girl from a boarding school.
And, in the meantime, Caius has met a possible new romantic interest at that play: Calliope, milliner to the posh.
Could all these things be connected somehow. Sure, in some ways, not in others. Advice to readers: pay particular information to the party blather in Chapter One: you'll know things that don't become apparent to the principals until much later in the book.
Lots of Britishisms, which you, American, may have to either look up, figure out, or ignore. (Or, if you watch enough Britbox, maybe you know.)