I initially bought the second book in this series, I Spy, but on learning that this volume preceded it I thought it apt to try this one out first. It’s not a huge book and is very accessible. The autobiographical account of a soldier from the streets, recognised for his unique skills and recruited to the frontline of British domestic terrorist services as an MI5 agent. Tom specialises in urban warfare of the 21st century. Surveillance and counter-surveillance operations are detailed. Sometimes an overuse, I felt, of the Alpha-Bravo codes that gets a bit confusing to a non-specialist, these operations span a variety of different cases across the UK, in MI5’s daily battles to preserve national security. We go from standard fighting Islamic terror cells, to murky traditional cold war -esque battles with traditionalist Russian agents, trying to steal military technologies on a vast scale from UK businesses. Tom isn’t frightened to mix it up, smashing hell out of a copper as part of his cover in an IRA pub in Scotland makes interesting reading. In the background of his flat out work where often he doesn’t even get to piss or eat, this brave young soldier tries to switch off at the end of the day and is a family man, on the pittance wages MI5 pays their employees he is left with the typical British task of every day workers of paying off mounting debts and grappling with mortgage etc. Eventually, the book sadly crumbles away with Marcus’ post traumatic stress difficulties getting the better of him ultimately ending in a medical discharge from the service. I feel it is MI5’s loss and not his really and hope he makes some nice dollar off producing decent readable material for years to come.