Tommy Wildeblood, hero of Beneath the Streets, has put his days as a Piccadilly rent boy and scandal-hunting sleuth behind him, to study at the radical Polytechnic of North London. During a pitched battle against National Front infiltrators at the Poly, he meets handsome young Irishman Liam and embarks on the sort of romantic relationship he never thought he would have.  But is it too good to be true? Liam's abrupt disappearance prompts Tommy to question how much he knows about his new lover. Dusting off his old sleuthing skills, Tommy's hunt for Liam takes him into the dark and violent netherworld of radical politics. As his search moves to an explosive climax, he finds himself in danger of carrying the can for one of the most shocking events of the decade. With the twin spectres of Aids and nuclear armageddon never far away, The Enemy Within is a gritty thriller built around a story of love in terrifying times.

It captures the unique spirit of a dark and brooding age, with a supporting cast including Derek Jarman, corrupt Trotskyist leader Gerry Healy, a young Jeremy Corbyn and even Maggie Thatcher herself.