Still in the formative years of his career, Hercule Poirot faces a most taxing case: who killed Lord Cronshaw? Was Coco Courtenay's death on the same night a mere coincidence? And did she deliberately take an overdose of cocaine?

Gipsy's Acre was a truly beautiful upland site with views out to sea, and in Michael Rogers it stirred a child-like fantasy. There, amongst the dark fir trees, he planned to build a house, find a girl, and live happily ever after. But as he left the village, a shadow of menace hung over the land, for this was the place where accidents happened. Perhaps Michael should have heeded the locals' warnings: "There's no luck for them as meddles with Gipsy's Acre."

In a remote house in the middle of Dartmoor, six shadowy figures huddle around a small table for a seance. Tension rises as the spirits spell out a chilling message: "Captain Trevelyan...dead...murder."

Dr. Arthur Calgary takes a ferry across the Rubicon River to Sunny Point, the home of the Argyle family. A year before, the matriarch of the family was murdered and a son, Jack, was convicted and sentenced to spend the rest of his life in prison. Dr. Calgary is surprised when his revelation has a disturbing effect on the family: it means one of the family is a murderer.

The Leonides are one big happy family living in a sprawling, ramshackle mansion - until the head of the household, Aristide, is murdered with a fatal barbiturate injection. Suspicion naturally falls on the old man's young widow, 50 years his junior. But the murderer hasn't reckoned on the tenacity of Charles Hayward, fiancé of the late millionaire's granddaughter.

Mrs Packington felt alone, helpless, and utterly forlorn. But her life changed when she stumbled upon an advertisement in The Times which read: "ARE YOU HAPPY? IF NOT, CONSULT MR PARKER PYNE". Equally adept at putting together the pieces of a marriage or the fragments of a murder mystery, Mr Parker Pyne was possibly the world's most unconventional private eye, and certainly its most charming.

Clarissa, the wife of a Foreign Office diplomat, is given to daydreaming. "Supposing I were to come down one morning and find a dead body in the library, what should I do?" she muses. Clarissa has her chance to find out when she discovers a body in the drawing-room of her house in Kent. Desperate to dispose of the body before her husband comes home with an important foreign politician, Clarissa persuades her three house guests to become accessories and accomplices.

So far, it had been a typical New Year's Eve house party. But Mr. Satterthwaite, a keen observer of human nature, sensed that the real drama of the evening was yet to unfold. So it proved when a mysterious stranger arrived after midnight. Who was this Mr. Quin? And why did his presence have such a pronounced effect on Eleanor Portal, the woman with the dyed-black hair?

Sir Stafford Nye's journey home from Malaysia to London takes an unexpected twist in the passenger lounge at Frankfurt: a young woman confides in him that someone is trying to kill her.

Here are 12 ingenious, witty mysteries showing the author at her best, including: the curious disappearance of Lord Listerdale, the strange meeting on a train of a feckless man and a beautiful girl, and Philomel Cottage and the extraordinary country house visit of Edward Robinson. Each is expertly narrated by Hugh Fraser.