Framed in the doorway of Hercule Poirot's bedroom stands an uninvited guest, coated from head to foot in dust. The man stares for a moment, then he sways and falls. Who is he? Is he suffering from shock or just exhaustion? Above all, what is the significance of the figure 4, scribbled over and over again on a sheet of paper? Poirot finds himself plunged into a world of international intrigue, risking his life--and that of his 'twin brother'--to uncover...

Roger Ackroyd knew too much. He knew that the woman he loved had poisoned her brutal first husband. He suspected also that someone had been blackmailing her. Then, tragically, came the news that she had taken her own life with a drug overdose. But the evening post brought Roger one last fatal scrap of information. Unfortunately, before he could finish reading the letter, he was stabbed to death.

Criminologist Charles Hayward becomes a special assistant to Scotland Yard when his fiancee's grandfather is murdered, and her entire family comes under suspicion.

Hercule Poirot investigates the double suicide deaths of Lord and Lady Ravenscroft that occurred twelve years ago. There are hints that it was not suicide after all.

Ten strangers, each with a dark secret, are gathereed together on an isolated island by a mysterious host. One by one, they die, and before the weekend is out, there will be none.

Hercule Poirot may be on vacation, but a killer isn't. The victim's a hateful tourist despised even by her own children. For the guests at the resort hotel, sympathies are with the murderer, which means a tough job for the Belgian detective.