It's been a while since I've read these, so I was hoping the break would boost my enjoyment again. But by this book (#28 in the series), I've caught on to a few of the hints, or maybe Freeman just wasn't trying as hard to be secretive, I don't know. But I caught on to the plot pretty early on. Not all of it, I had one thing actually backwards, but other than that nothing really new.
Half, almost 2/3, of the book is told from third person but following the artist Pedley around. Then it switches to the usual first person of Jervis, and a couple chapters sum up events thus far before Thorndyke gets the case on an official basis. Jervis really took a back seat in this one, letting Thorndyke hide in the lab for hours at a time and not hounding him for questions or trying to get evidence for himself. Kind of a blah read, honestly.