An enchanting hardback special edition to honour twenty years of a bestselling phenomenon, with a new introduction by Ian Rankin . A long-buried secret. A life-changing quest.

JULY 1209. In Carcassonne, seventeen-year-old Alaïs Pelletier is given a mysterious book by her father, which he claims contains the secret of the true Grail. Although Alaïs cannot understand the strange words and symbols hidden within, she knows that her destiny lies in keeping the secret of the labyrinth safe.

JULY 2005. In a forgotten cave in the French Pyrenees, archaeologist Alice Tanner discovers two skeletons. Puzzled by the labyrinth symbol carved into the rock, she realises she has disturbed something that was meant to remain buried.

Soon, a link to a shocking secret - and her own past - is revealed . . .