how is he supposed to have been born?
Rhea gave birth to Zeus in Crete, handing Cronus a rock wrapped in swaddling clothes, which Uranus promptly swallowed.
Zeus
Cronus sired several children by Rhea: Hestia, Demeter, Hera, Hades, and Poseidon, but swallowed them all as soon as they were born, since he had learned from Gaia and Uranus that he was destined to be overthrown by his son as he had previously overthrown Uranus, his own father, an oracle that Rhea heard and wished to avert.

When Zeus was about to be born, Rhea sought Gaia to devise a plan to save him, so that Cronus would get his retribution for his acts against Uranus and his own children. Rhea gave birth to Zeus in Crete, handing Cronus a rock wrapped in swaddling clothes, which he promptly swallowed.
who stole the lightning bolt in percy jackson book Ares what is the title of the book you are talking about? The Lightning Thief who is it written by? Rick Riordan who is the character mentioned in the beginning? He is the Greek god of war in the book, who did this bolt originally belong to? Zeus and who is he? He is the sky and thunder god in ancient Greek religion, who rules as king of the gods of Mount Olympus.
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Zeus [SEP] Birth
Cronus sired several children by Rhea: Hestia, Demeter, Hera, Hades, and Poseidon, but swallowed them all as soon as they were born, since he had learned from Gaia and Uranus that he was destined to be overthrown by his son as he had previously overthrown Uranus, his own father, an oracle that Rhea heard and wished to avert. When Zeus was about to be born, Rhea sought Gaia to devise a plan to save him, so that Cronus would get his retribution for his acts against Uranus and his own children. Rhea gave birth to Zeus in Crete, handing Cronus a rock wrapped in swaddling clothes, which he promptly swallowed.