After two years of watching the release date hover in flux and getting pushed back time and time again, I must confess waiting for this book was its own special kind of agony. That was also when I realized I was irrevocably addicted to Peter Grant. The Hanging Tree is book six of the series which returns to London and places the main story arc back on track, following the short respite we took to the countryside with our protagonist in Foxglove Summer. The story begins with a drug-related death at a house party in one of the most exclusive residential areas in the city. Normally, the case wouldn’t have been within the purview of the Folly, which the Met’s investigative unit for all things magical and paranormal, except for the fact that one of the party goers turned out to be the daughter of Lady Ty, goddess of the river Tyburn. Suddenly, Peter is in a bind since he owes Lady Ty a favor, and as such he has reluctantly agreed to do all he can to keep her teenage daughter Olivia out of investigation. But as it turns out, his promise might be a moot point. After all,…