Concrete crime

AKA Crime in Concrete From the paperback edition's back cover: "It started the night a safe-cracker was shot on a Stepney street by a soft-spoken killer. Through an ingenious piece of detection -- and with the help of his underworld friends -- Tommy Hambledon succeeded in identifying the killer as the notorious Louis Magid. The problem was to find a man so vicious and so feared that even criminals let him walk alone.

The trail led to a small French village, an old castle and a mysterious woman. And, as Hambledon discovered, in crime the female of the species is indeed deadlier than the male."