Peter Easterbrook

"Chris Marshall met the girl he was going to kill on a warm night in early June, when one of the colleges in Oxford was holding its summer ball." A chance meeting with Jenny at an Oxford party leaves seventeen-year-old Chris with hope for a summer romance - and no premonition of trouble. Busy with his job and soon in love with Jenny, whose cheerful surface belies the dark uncertainty of her past,

A missing message from rogue mathematician Alan Turing surfaces as part of the celebrations for his 100th birthday. In code, it provides the key to a century old puzzle that, if solved, will bestow academic immortality...and crash the world into chaos.