Sisyphus was son of the king Aeolus of Thessaly and Enarete, and the founder and first king of Ephyra (Corinth). He was the father of Glaucus by the nymph Merope, and the grandfather of Bellerophon.Source
Sisyphus promoted navigation and commerce, but was avaricious and deceitful, violating the laws of hospitality by killing travelers and guests. He took pleasure in these killings because they allowed him to maintain his dominant position. From Homer onwards, Sisyphus was famed as the craftiest of men. He seduced his niece, took his brother's throne and betrayed Zeus' secrets. Zeus then ordered Thanatos (Death personified) to chain Sisyphus in Tartarus. Sisyphus slyly asked Thanatos to try the chains to show how they worked. When Thanatos did so, Sisyphus secured them and threatened him. This caused an uproar, and no human could die until Ares (who was annoyed that his battles had lost their fun because his opponents would not die) intervened, freeing Death and sending Sisyphus to Tartarus.
Also the famous Existentialist philosopher Albert Camus wrote an essay "The Myth of Sisyphus"
In the essay, Camus introduces his philosophy of the absurd: man's futile search for meaning, unity and clarity in the face of an unintelligible world devoid of God and eternal truths or values.Source