The Hanging Tree is definitely one of the best in the Grant/Aaronovitch pantheon. There again, so have most of the previous books in the series and the odds are the next one probably will be too.
This series is brilliant!
Ben Aaronovitch is a master of metropolitan magical mayhem and the action is delightful. This is a tight thriller that is compelling and buckets of fun.
Once you start, you'll find a London that's just dying to be explored.
It feels like Aaronovitch is scaling up to something big and series ending. But not too soon, please, because getting there is so delightful.
Aaronovitch deftly balances urban fantasy with the police procedural. As for Grant, he's a wonderful blend of laconic copper and, methodically researching how magic works, full-on nerd.
Aaronovitch is writing proper police procedural novels, which are at the same time proper novels about the myths and legends of London. His characters are ones you'll want to come back to, his plots are convincingly contemporary and his humour is well-judged. Altogether, this is one of the most satisfying series currently available.
Aaronovitch has outdone himself this time - it's the best book of the series thus far, and that's no mean feat.