Duncan Steele has nowhere to run when he creates Z4CK, the means by which he can bypass any network security. Things take a turn for the worse when Duncan is contracted to audit a secure network, finding more than he bargained for. Nervous government agencies, and other foreign powers will do anything to obtain Z4CK. Hunted for a murder he did not commit, Duncan must use all of his hacking skills to survive, and clear his name. Set in Edinburgh the book starts in the year 2031. The world is a different place where Microsoft advertise Linux on Airport bulletin boards. Unlike films such as The Net, this cyber thriller provides an insight into realistic hacker tools and techniques, whilst not becoming too technical, allowing anyone with an interest in a good story to understand and enjoy it.