Taliesin, Chief of Bards by Alexander Corby
Arthur is dead and Britain lies on the verge of total war. In the legendary kingdom of Cantre'r Gwaelod, a mysterious boy is adopted by the luckless Prince Elphin. The young boy's quick wit and uncanny intelligence earn him the name Taliesin. Twelve years go by and Elphin is invited to a Christmas feast by King Maelgwn Gwynedd, a ruthless rival of Cantre'r Gwaelod. When Elphin is betrayed and imprisoned by Maelgwn, Taliesin must utilize all his bravery and cunning to save his beloved guardian. With the help of his cousin Tudno, the sly maid Mererid, and the crafty bard Bryn, Taliesin must unlock the secret behind his extraordinary gifts to save everyone he loves from certain destruction.