The legends about King Arthur are steeped in mysticism and magic from his birth to his death. It's even foretold that he and his Knights will one day reawaken from a magical sleep to defend their beloved country at a time of need.

Central to traditional stories are fabulous objects like the sword Excalibur and the Holy Grail, the prophecies of Merlin, the witchcraft of Morgana Le Fey and the charms of the Lady of the Lake in the mysterious Isle of Avalon, the Celtic Land of the Dead. On nearby Glastonbury Tor, a stone circle of the sun was a hub of pagan worship and devotion long before written history.

Prominent in Arthurian literature are medieval terminators, enemies with superhuman powers like the Green Knight, who is able to replace his own severed head. Mere knights can only hope to protect themselves against such sorcery through chivalry, loyalty, honour and a pure heart.

Sir Gawain and the Green Knight from a 14th Century medieval manuscript.

Dragons and mythical creatures appear in many accounts of Camelot. In Knight for a Day Henry and Sir Perceval must find their way through a sinister fog in an enchanted forest, chilled by the frightful howls of werewolves and harsh cries of black carrion crows, the agents of death and witchcraft.

Henry's voyage through time is linked to two extraordinary, forgotten or lost magical objects: King Arthur's stone and Excalibur's scabbard.