The action-packed sixth adventure in the number one bestselling Alex Rider series. The action-packed sixth adventure in the number one bestselling Alex Rider series. In the sixth book in the number one bestselling Alex Rider series by Anthony Horowitz, teenage spy Alex has a chance encounter with the son of multi-billionaire Nikolei Drevin. Soon Alex finds himself in the middle of an international crime hunt. The connection - Ark Angel, a revolutionary space hotel with catastrophic potential.