John Mannering (aka ‘The Baron’) is an ex-cracksman, who is now ‘straight’, and also acts to solve crimes. His wife learns that Quinns, a curio shop in London’s Mayfair is for sale, and urges him to buy it. His attempt to do so, however, is shrouded in mystery, and the police wonder if he has once again turned his hand to his old profession.

A Post Office sorter is killed, and Inspector Roger ‘Handsome’ West is called to investigate. What is the connection with a series of outrageous and bold daylight crimes that have taken place? This is an action packed story of tenacity, full of suspense in the face of difficulties which might well defeat a lesser detective.

Scotland Yard's Commander George Gideon remained convinced that London was civilized. However, he is forced to reconsider when the upcoming election turns into something ugly. Matters take an even stranger turn when it is discovered that a warhead and a small nuclear reactor are missing. Is there a connection? Gideon is left to work it out ....

John Mannering (aka ‘The Baron’), now retired as the country’s top jewel thief, receives a visitor. It is Prince Taria, son of the ruler of a small island off the coast of Malaysia. He is searching for his dynastic treasures and is also determined to give his island a true democracy, but his life is now threatened by the enemies of his people.

A thief has ransacked every room in the Royal Hotel. Supt. Bristow discovers John Mannering (aka ‘The Baron’) is a guest, along with his wife, Lorna. Valuable jewellery has been stolen and there is clearly an abiding suspicion – but then comes a mysterious call. A man has two diamonds to sell and also has a very surprising confession to make ...

John Mannering (aka ‘The Baron’) decides to open a branch in Boston and at the same time move to an Elizabethan Manor House. However, the present owner of the house disappears, and a man is found dead in one of its secret stairways. Further mystery ensues and then ‘The Baron’ is arrested for murder.

John Mannering (aka ‘The Baron’) bought the Dellamont Emeralds. But he chose to ignore their history of misfortune. Then things began to happen - an attempted robbery of the famous jewels; and a quarrel with Lorna Fauntley. Seemingly separate incidents, yet all connected. The strangest thing of all was that someone was impersonating the Baron ....

Roger ‘Handsome’ West of Scotland Yard is called upon to investigate a brutal attack that took place in a luxury penthouse, where there is a mirrored bedroom and a mysterious, concealed, safe. The trail leads to an abortion clinic and a major film studio, but how are these linked and why is West in more danger than even he realises?

After a series of robberies Roger West, of Scotland Yard investigates. Then there is a killing at London’s largest department store. The victim had been living with his son-in-law, whose has a lot of explaining to do. The Chairman of the robbed store is far from helpful and West must uncover the secrets that everyone appears to be hiding.