Cormac Mac Airt has a hundred and one stories told in his name. They say he was suckled by a wolf as a babe. They say he stopped a castle from falling into the sea by telling a truth. They say he loved a lady of the Sidhe, and enraged a druid. His story has been stitched over by the tongues of a thousand storytellers. But there is one story he told himself: the Tecosca Cormaic, a poetic guide...