I’ll be posting a review later. I just wanted to do my back-patting and forehead-slapping in a separate post. Spoilers abound!
The back-patting: I correctly guessed both Margot’s parentage and Grey Mask’s identity. The former I guessed when the near-identical desks with near-identical monograms showed up. The latter I guessed when Margaret told Charles her broken engagement tale of woe. Only one person in her immediate circle was both a member of Grey Mask’s group and ideally placed to come up with such a plausible false confession. First I suspected Freddy of stealing the jewelry himself, and then I realized that Margaret had never seen Freddy and Grey Mask together. Throw in a dash of “It’s always the person you least suspect” and you get a nicely seasoned pot of Overly Complicated Mastermind Stew.
The forehead-slapping: Things I totally did NOT see coming include but are not limited to: #40’s loyalties, the crooked lawyer (I really should've seen that one coming), 2/3 of the dead characters coming back to life, and the super-rushed ending. Since I’m reading a 3-book omnibus, I had pretty much no warning when I turned the page and was confronted by the cover art for the next book. It felt SUPER abrupt.