Shalott: Into the Unknown (Shalott Trilogy) by Pulman, Felicity

Five teenagers set out into the unknown to change the legend of Camelot. Instead they find they are rewriting their own lives and destiny.

Callie's quest was simple: to change the fate of the Lady of Shalott on a computer program and save her along with King Arthur and the knights of the Round Table. But when the five teenagers find themselves in Camelot, they become caught up in the illicit love affair between Lancelot and Guinevere, the intrigues of the court, and the ambition of the magical Morgan le Fay. Do they have enough courage to survive the dangers they face? And how can they find their way home when everything they have ever known and believed is challenged? What Callie finds in Camelot will break her heart, while her quest will change all of their lives forever.

'In this extraordinary trilogy Felicity Pulman shows both her understanding of the Arthurian legend, of the Shalott story, and a rich and imaginative capacity to expand and explore its deep meanings for today's teenagers. This is an unsettling, unusual, intriguing and moving series, rich in character, action and mystery, full of the atmosphere of Arthurian legend, yet without falling into the trap of mere retelling.' - Sophie Masson