In this book, Merlin’s origins are traced back to the story of Lailoken, a mysterious ‘wild man’ who is said to have lived in the Scottish Lowlands in the sixth century AD. The book considers the question of whether Lailoken belongs to myth or reality. It looks at the historical background of his story and discusses key characters such as Saint Kentigern of Glasgow and King Rhydderch of Dumbarton, as well as important events such as the Battle of Arfderydd.