The sequel to "Rivers of London". We meet Peter Grant again, the trainee wizard in the London Metropolitan Police, who hunts supernatural forces, investigates supernatural crimes, tries to save the life of that make everyone's life miserable.
Same as the first one, this book is funny and interesting to read. Lots of fantasy elements mixed in with real life but deep down a crime story with likeable characters. If you enjoyed "Rivers of London", you will like this one, as well. If you haven't read "Rivers of London" (or "Midnight Riot" in the US), read that first. This really should be read as a sequel.
From the back cover: "My name is Peter Grant, and I’m a Detective Constable in that might army for justice known as the Metropolitan Police (a.k.a. The Filth). I’m also a trainee wizard, the first such apprentice in fifty years.
Something violently supernatural had happened, something strong enough to leave an imprint on the corpse of part-time jazz saxophonist Cyrus Wilkinson as if he were a wax cylinder recording. He's not the first musician to drop dead of a heart attack right after a gig, but no one was going to let me start examining corpses to check for supernatural similarities. Instead, it was back to old-fashioned police legwork. It didn't take me long to realise there were monsters stalking Soho, creatures feeding off the gift that separates great musicians from those who can raise a decent tune. What they take is beauty. What they left behind is broken lives.
And as I hunted them, my investigation got tangled up in another story: a brilliant trumpet player, Richard 'Lord' Grant – my father – who managed to destroy his own career. Twice.
Policing: most of the time you're doing it to maintain public order. Occasionally you're doing it for justice. And, maybe once in a career, you're doing it for revenge."
The whole series:
"Rivers of London" - 2011
"Moon over Soho" - 2011
"Whispers Under Ground" - 2012
"Broken Homes" - 2013
"Foxglove Summer" - 2014
"The Hanging Tree" - 2016
I found a good site about this series: The Follypedia.