I was initially disappointed with this book. The first couple of chapters had that sort of clumsy and obvious Romance trope of two lovers who had ended things badly but still longed for one another, and I really dislike Romance genre mixed into my mystery-thriller genre. But before long I was thoroughly engrossed in the story and the characters, so much so that I couldn't muster more than an occasional eye-roll for the terribly implausible medical stuff.
It was good! It kept me on the edge of my seat to the very end, even though the plot twist wasn't very twisty. I'm sorry, I realize I'm not making this book sound very good, and objectively I guess there was a lot to complain about, but the author's strength as a storyteller somehow overcomes all those things. I'm looking forward to the next book in the series.
Audiobook via Audible, read by Kathleen Early. She's read almost all the other Slaughter books I've listened to, and I've enjoyed her performances, but for some reason she seemed a little stilted on this one. But I did like it! I don't know why.