She's playing a dangerous game... but whose side is she on?

Amanda Harcourt, a bright young British diplomat's daughter living in Lisbon, goes missing. Peter Craig, a British police officer on leave in the city, finds himself caught in the web of intrigue surrounding her disappearance. Tasked with finding Amanda before the Portuguese secret police, Craig uncovers a dangerous game of espionage with Amanda as the unsuspecting pawn.

Craig soon discovers that Amanda's involvement with a charismatic revolutionary leader, João Costa, was a mere cover for her recruitment by Miloslav Janek, a cunning Soviet intelligence officer operating undercover in Portugal. Torn between her loyalty to her country and her feelings for the men in her life, Amanda walks a tightrope of deception as she becomes Janek's "Sole Agent".

Caught in a crossfire of political agendas and personal betrayals, Craig races against time to uncover the truth and save Amanda from the deadly consequences of her double life. But as the lines between loyalty and treachery blur, Craig must question everything he thought he knew about Amanda and her motives.

Sole Agent is a gripping thriller that will keep you on the edge of your seat until the very last page.

Praise for Sole Agent

"Benton is one of those leisurely Englishmen who has a civilised, cultured style, and who knows how to get the reader involved in a complicated chess game of competing secret agencies." -- New York Times Book Review, 1972

"Mr Benton's Peter Craig is as resourceful as he is likeable and tough...lots of action and some nice, crisp talk." -- Oxford Times, 1970

"International indiscretions in Lisbon, with an intriguing mixture of Russian spies, Portuguese secret police and ingenuous revolutionary groups." -- Glasgow Herald, 1971

"Competent and tense to the last page." -- Belfast Telegraph, 1971

"An exciting and determinedly topical spy novella." -- The Scotsman, 1971

"This low-key, intelligent sleuth-agent never seems to have a moment to himself ... Benton’s strong point is interesting insights into international diplomacy, embassy life and embassy types." -- Buffalo, NY News, 1975