A British husband and wife, both atomic scientists, disappear whilst on holiday. The suspicion is they've been kidnapped and Drake is sent to investigate.

Bierce is a British diplomat in France. He shoots a man, to whom he owes money, and hides the body. He then suddenly disappears. Drake is sent to try and find out what has happened to him.

Drake follows a young lady, who has been selling secrets, to France where he confronts her with what he knows. Kathleen is being blackmailed and her role is to take the information to France. She offers to help Drake find who employs her.

A government officer's defected, and M9 wants him back, and Drake's to try and get him.

After a driving accident, Drake finds he has a £500 gambling debt at a club he has no knowledge of, yet the staff seem to know him, and the club's manager, Mr. Alexander knows all about Drake's career with M9, and plans to blackmail him.

A former republican leader returns to his home country to retire. However, he is arrested by the current president and faces the death sentence, something both the British and Americans do not want to happen. Drake is sent in to stop it.

To save a friend with sensitive information who is being held in the Romanian embassy in Geneva, Drake must break into the embassy, in defiance of the British ambassador, retrieve his friend, and avoid an international incident.

Drake discovers that a woman is financing political agitators in Santo Marco trying to bring down the government. He sets out to find out who employs her and why. Drake finds it is being funded by a rich member of the aristocracy.

A prisoner is soon to be released and is offered a well-paid job that is obviously crooked. As he wants to go straight, he reports the approach. Drake takes his place in order to find out what the crime is to be, which is murder.

Confidential papers go missing, and Drake travels to a small island off the coast of Scotland in search of them and the culprit.

A glamorous actress is murdered and an M9 agent, whose cover has been discovered, is framed for her murder. Drake task is to get him out of jail and off the island using a submarine code-named Doris.

An agent is selling secrets to a foreign government. How he is doing this is unclear so Drake is brought in to find out, which he does by befriending him as a bumbling teacher on stress leave.

Two M9 agents have been tortured and murdered on a Caribbean island, and Drake's sent to find out who killed them and to determine how much information they divulged before dying.

An international financier has come to the notice of M9, as he is believed to be an extortionist and murderer. When some important people are found dead, Drake goes undercover as a butler at the financier's rented villa in Rome.

A woman disguised as a clumsy tea lady steals some secret papers, which are sold to the highest bidder by a Mr Kent. M9 sends Drake to investigate a number of similar thefts by befriending the woman and infiltrating the organisation.

Drake is in India when he is asked by an old friend, the Delhi police chief, to investigate the mysterious death of the employee of a retired colonel. The colonel sells exotic butterflies but Drake finds out that there is a lot more to it.

M9 receives a mayday signal from an agent in an Arab country. He has been compromised and must get out. The agent is also the contact for a local spy called the Fish. Drake is sent undercover to bring the Fish out.

In a poignant reminder that spies are merely people and that they often take terrible punishment when caught, Drake tries to stop a former agent from killing the East German government official who had her tortured beyond repair.

Drake is sent to Africa to protect the prime minister, who is in the midst of an election campaign. It is suspected that the opposition leader is planning to overthrow the government but Drake finds out that it is much more complicated.

Drake takes the place of a defector and goes behind the iron curtain to find out what is happening when foreign agents reach England. When he gets there he finds a replica English village, which is a school where foreign agents are taught to 'be British'. Actual British subjects, such as Drake, are employed to teach the agents the finer points of the British way of life. Drake sets out to disrupt their education and stop the supply of agents from reaching England.

An important M9 agent has gone missing in Prague, and Drake's sent in as a British diplomat to find him. It appears a blackmail ring is operating, and soon, Drake has to rescue the agent, and his family, from death.

Mr. Brett is known to be giving away British industrial secrets. However, when Drake confronts him, he discovers things are a lot more complicated and that John Brett is not the only person being investigated.