Playing with Fire: A 1960s British mystery by Patricia Hall

A young girl falls to her death from a night club.  She was too young to be there, nobody seems to have seen her, and nobody has reported her missing.  Who is she and did she fall or was she pushed?

Severn House and Net Galley let me read this book for review (thank you).  It will be published December 1st.

Harry can feel Soho changing.  There's a new group in town that's playing rough and demanding protection money.  He's not sure who they are but it's not the old group.  Not only that, there are new drugs on the street.  Maybe that was why that young one thought she could fly...

As Harry and his girlfriend investigate, they get very close to the new bad guys.  Harry has to ask her to move out so nobody hurts her.  Harry's job is threatened.  They still almost kill his girlfriend with a spiked drink.

These bad guys are really bad and they care only for money.  They leave the dead behind as messages.  Will Harry and his girl survive?