Self’s Punishment by Thomas Richter, (Weidenfeld, £12.99) introduces Gerhard Self, a German private detective, who, now aged 68, was once a prosecutor during the Nazi period. His brother-in-law, Korten, who is also an old school friend, asks him to investigate a nuisance hacker at the chemical factory that he heads. The case is not in the least straightforward; Self understands nothing about computers but between his lunch and dinners (always meticulously described; German food sounds utterly delicious coming from the Richter pen), Aviator cocktails and copious wine he does finger someone. When the suspect dies under ambiguous circumstances, Self cannot leave the case alone and finds himself led back into his own dubious past as a wartime prosecutor in Nazi Germany.

Gerhard Self is a find. He is likeable, eccentric and on the lookout for women, although romantically he cuts his coat according to his cloth. He is tough without any macho attitude and feels guilt when it is appropriate. He also, without any seeming angst, takes the law into his own hands. I look forward to his next appearance.

Patricia Cornwell’s Trace (Little Brown, £17.99) starts out well. Dr Kay Scarpetta, Cornwell’s heroine who cuts dead people up, is called to her old stamping-ground, Richmond, Virginia, to give a second opinion about a teenage girl who apparently died of influenza. She turns out to have been smothered and sexually assaulted in her bedroom while her mother was out buying cough mixture. Scarpetta is given a hard time as she investigates because Dr Joel Marcus, the chief medical examiner appointed after she was sacked, is uncertifiably insane. He has her brought on to the case in order to humiliate her because he is jealous of her reputation. All this is rather fun. Unfortunately, the novel falls apart when a link is discovered with a case of sexual assault against Scarpetta’s niece in another town. From then on it is one great yawn: neither a who-done-it nor a why-done-it but a case of how-absurdly-done. A pity.

Sue Grafton’s R is for Ricochet (Macmillan, £16.99) is more interesting than her previous novel but it does not really hang together. Kinsey Millhorne, her engaging private detective heroine, suddenly becomes a wimp, pulled along by an out-of-control woman on parole whom she is being paid by her rich father to chaperone. The woman, Reba Lafferty, a gambler, drinker and druggy, took the rap for her lover and employer and went to prison to protect his hide when money went missing from his business. She comes out of prison full of love and expectation, but this turns to revenge when she realises that she was merely a patsy. Kinsey follows in her wake flapping her arms and about three beats behind Reba’s thinking. It would not surprise me if Reba reappears in future books. Perhaps Grafton is tiring of Kinsey.

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