Very clever, both mysteries, though I guessed the framing one before it was revealed. I so enjoyed this book, I've bought the sequel.
Two weird errors I read the Atticus Pund novel with care as I assumed it would contain clues I needed for the main mystery. There were two mistakes in it which I thought were significant - they weren't, so don't worry about spoilers. Were they real errors, or subtle signs that the manuscript needing editing? 1) Joy never said her scooter was pink, but Pund mentions the colour shortly after 2) Pund says that someone can't spell 'building' in a note, but it was correct in the note If they were there to show that Susan had to edit the novel, then I'd like to have had some confirmation.