The Alchemist Chronicles Series by C.J. Daugherty, Carina Rozenfeld

French teen Sacha Winters can't die. He can throw himself off a roof, be stabbed, even shot, and he will always survive. Until the day when history and ancient enmities dictate that he must die. Worse still, his death will trigger something awful. Something deadly. And that day is closing in. Taylor Montclair is a normal English girl, hanging out with her friends and studying for exams, until she starts shorting out the lights with her brain... moreFrench teen Sacha Winters can't die. He can throw himself off a roof, be stabbed, even shot, and he will always survive. Until the day when history and ancient enmities dictate that he must die. Worse still, his death will trigger something awful. Something deadly. And that day is closing in. Taylor Montclair is a normal English girl, hanging out with her friends and studying for exams, until she starts shorting out the lights with her brain. She’s also the only person on earth who can save Sacha. There’s only one problem: the two of them have never met. They live hundreds of miles apart and powerful forces will stop at nothing to keep them apart. They have eight weeks to find each other. Will they survive long enough to save the world? less

'Remember: Demons lie'. Locked away inside the fortified walls of Oxford's St Wilfred's College, surrounded by alchemists sworn to protect them, Taylor and Sacha are safe from the Darkness. For now. But time is short. In seven days Sacha will turn 18, and the ancient curse that once made him invincible will kill him, unleashing unimaginable demonic horror upon the world. There is one way to stop it... more'Remember: Demons lie'. Locked away inside the fortified walls of Oxford's St Wilfred's College, surrounded by alchemists sworn to protect them, Taylor and Sacha are safe from the Darkness. For now. But time is short. In seven days Sacha will turn 18, and the ancient curse that once made him invincible will kill him, unleashing unimaginable demonic horror upon the world. There is one way to stop it. Taylor and Sacha must go to where the curse was first cast - the medieval French city of Carcassonne - and face the demons. The journey will be dangerous. And monsters are waiting for them. But as Darkness descends on Oxford, their choice is stark. They must face everything that scares them, or lose everything they love. less