Keeper of the Grail: The Youngest Templar, Book 1

Washed up on a foreign shore, Tristan is lucky to be alive. As before, it seems to be a miracle- the Holy Grail the young Templar squire is protecting has saved his life yet again. But now he is lost in a strange land, and he doesn't know if his friends, the fiery archer Robard Hode and the Saracen assassin maid Maryam, still survive. Tristan's knack for getting into trouble is alive and well, though, and he quickly finds himself drawn into a conflict between a heretical band of Cathars and the oppressive King of France.
With his duty to the Grail pulling him back toward Britain, Tristan finds himself falling for the beautiful leader of the Cathars. And when he chooses to help her in her people's hour of need, Tristan risks not only himself but his friends and the Grail itself on a quest that may prove to be a disaster.