This time Peter is going underground and the Americans are involved. Can’t be good. Luckily the American element is much more limited than the blurb would suggest, and like before the city steals the spotlight. London is a character in itself here. The long plot continues, the characters evolve, and the incidental murder mystery plays a slightly bigger role this time. There’s less of magical apprentice work and more of good old fashioned legwork for Peter. Although as a Finn, I had to take the descriptions of extreme weather conditions with a grain of salt.