Reliable London police detective Bill Slider is back in the eighteenth of the Bill Slider series, proving that you are never far away from crime in a city. ONE UNDER is the term used for someone who falls under an Underground train. We start by following the case of a jumper, with the memorable name of George Peloponnos. Then we hear no more about the suicide, until his name reappears as a friend of a young woman found dead on the side of a road outside London around the same time. Coincidence? Slider doesn't believe in coincidence.

The Shepherd's Bush police station doesn't deal with the glamorous end of town, but Slider and his orchestral musician wife Joanna lend grace and strength to the tale. Checking out the death of a young woman is given to the female police officers. Kaylee, mid-teens, was sufficiently at risk that social workers knew she existed. Her mother does drugs with the latest boyfriend so Kaylee stayed with an older sister or a girl pal. One of the girls has men clients to keep her in ready money. Police Constable Connolly, her Irish accent charming witnesses and relatives, seems to be the only person who cares what Kaylee was doing.

The overall tone, it must be said, is depressing. The evident dejection, waste and loss of talent involved in Britain's youth culture explains the need for immigrant workers to fill the jobs with talented, educated young adults. Sink estates, ready drugs, and bad schools are seen to contribute. With Constable Connolly we go from home to home, tracking down girls, mothers, and rumours of parties because the postmortem results show this was no hit and run but a case of a girl falling to her death and the body being dumped on the road.

Ruefully Bill Slider looks at the files and modern-speak of policing - managers, HR, PR, spreadsheets - and tries to get back to basics. He and Joanna are still quite tender about a loss, and when the big levers of policing budgetary controllers and Members of Parliament enter the picture, he's stymied. I enjoy how we get a realistic look at policing and those who see this as the day job. Cynthia Harrod-Eagles brings Slider up to date for her loyal readers along with her usual chatty humour. Phone records and cameras are among the tools of the modern coppers' trade, but in ONE UNDER we see that sheer dedication, nosiness, and stubbornness are still a detective's greatest assets. Along with a reluctance to believe in coincidences. Influence and power mean a copper should know when he needs to leave well alone. But... when poor young girls are being used and abused... what is Slider's choice? Cynthia Harrod- Eagles wins our admiration as the adventure proceeds and as always leaves us satisfied.