Mark Sanderson does for the 30s what Jake Arnott did for 60s London – vividly revealing its hidden underworld in an unforgettably gripping crime novel.

"Friday, 18 December, 1936. I went to my funeral this morning…"

So begins the diary of John Steadman, an ambitious young journalist in London. When he gets a tip-off about a murdered policeman, he thinks he's found his scoop. Trouble is, no-one else seems to know anything about it… or they're not telling.

Then John finds someone willing to talk. At least, someone who was. Now they're hanging from a meat hook in a refrigerated locker and John's on the verge of a front-page scandal that will make or break his career. But to get to the heart of this dark story, he must first go undercover. Six feet undercover, to be precise…

Based on a shocking true story, Snow Hill vividly brings to life a London you never knew about – an underworld that doesn't officially exist and until now has never been documented.