"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,

The Butterfly Tattoo

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.