I am a HUGE Rivers of London fan, and definitely agree about the ending of Foxglove Summer. It seemed to come out of nowhere and leave too much unsaid. I liked the overall impression of the book, but it didn't hook me in like the others. Are you going for The Furthest Station next, or skipping to The Hanging Tree? The latest one has gone straight on my Christmas List, as I like the audio versions better. The narrator is so good, that Aaronovitch has said that this is the voice he hears for Peter now, which is pretty cool :)