Client Confidential

Seán Hartnett left the British army in 2005, operating as a covert surveillance technician at JCU-NI, the top-secret counter-terrorism unit in Northern Ireland. His experiences were published in the bestselling Charlie One , the book the British Ministry of Defence tried to ban. But this wasn't the end of Hartnett's career in counter-espionage. After operations in South Africa, Australia and London, he arrived home to Ireland, just as the Celtic Tiger was about to implode, but not before Hartnet