Shalott Series by Felicity Pulman

Callie is fascinated by her father's virtual reality machine. She wonders if she could use it to visit Camelot and change its history. But as she works on her program she is interrupted by her sister El and her friend Meg who want to be part of the game - they want to be characters at Camelot too. In spite of her misgivings, Callie finds herself adding the pair and, finally, two boys they barely know - Lev the street-kid and Stephen, a loud snob... moreCallie is fascinated by her father's virtual reality machine. She wonders if she could use it to visit Camelot and change its history. But as she works on her program she is interrupted by her sister El and her friend Meg who want to be part of the game - they want to be characters at Camelot too. In spite of her misgivings, Callie finds herself adding the pair and, finally, two boys they barely know - Lev the street-kid and Stephen, a loud snob. It is all a game that Callie feels is getting out of hand, being spoilt by her pushy sister. But she has no idea just how out of hand this game will get when she is bumped and accidentally pushes the button that draws all five teens into the machine and back into the very real world of Camelot. less

Against her better judgment, Callie is persuaded to re-enter her father's virtual reality program in order to save the life of Howell's friend. But instead of reversing recent events, Callie, her sister El and their friends Stephen and Howell find themselves back in Camelot. Just as they meet up with their old friend Lev, Sir Bors' squire is thrown from a horse and dies... moreAgainst her better judgment, Callie is persuaded to re-enter her father's virtual reality program in order to save the life of Howell's friend. But instead of reversing recent events, Callie, her sister El and their friends Stephen and Howell find themselves back in Camelot. Just as they meet up with their old friend Lev, Sir Bors' squire is thrown from a horse and dies. Accident - or the result of two Howells confronting each other across the centuries?With Howell now blaming himself for two deaths, the teenagers become caught up in all the danger and intrigue marking the last days of Camelot. Callie's courage is tested to the limit as Morgan le Fay uses her terrifying dark arts to keep her from her true love, Lancelot, while Guinevere resorts to cunning and deceit in her determination to win Lancelot and conceive with him an heir for Camelot. Desperate to keep the ancient faith alive at court, Guinevere invokes the help of the Mother Goddess - and pays the penalty when the Christian Arthur sentences her to burn, along with the 'pagans', El and Stephen. It's up to the teenagers to find a way to save themselves (and Guinevere) from death as they realise that Camelot is doomed, and that Callie will lose Lancelot for ever.As in 'Shalott', once again Australian teenagers interact with characters and events detailed in Malory's 'Le Morte d'Arthur', giving new insight into an old legend while also exploring issues of concern to teenagers today. less