Clever book! I liked the twisty plot that managed to surprise me even when I thought I knew what was going on. It's the kind of book that dares you to solve the puzzle as it goes and is less invested in characters (who did occasionally dance towards the tv-sitcom-esque in terms of being a bucketful of recognizable quirks) than in playing through the plot. It was delightful in the way that all mysteries are delightful.