Francesca Kay's The Long Room is story about the loneliness and obsessions of a spy, the sort of spy whose life is dull, drab and tedious, not at all exciting.
It's primarily told from the point of view of Stephen, a man in his late 20s, recruited to the secret service at university. He works at the Institute with a team of friendly colleagues, but he doesn't like to socialise with them. During the week he lives in London where "it is a long time since he remembered to wash the sheets." At the weekends he retreats to his elderly mother in Didcot. It's a lonely life.
Stephen's job involves listening to tapes of telephone and house bugs and transcribing them to help identify security threats. This is 1981 Britain, when the IRA are planting bombs and members of CND are considered to be communists. In the course of his work, Stephen has become obsessed with Helen, the wife of a target, PHOENIX. He has only ever heard her beautiful voice, which "speaks poems to him, and her piano playing, and the sweetness of her nature." His thoughts veer towards worship, believing girls like Helen are "pure and vestal, the innocent and the good". His is a devotional, romantic idea of love.
Ultimately The Long Room is a character-driven story with a well-drawn protagonist, however it comes across as a bit too clever. If your literature studies ended at age 16 you might not pick up on some references. A google search after finishing revealed allusions aplenty to Byron and romantic love, Shelley and the quest for perfect union, Goethe and introversion, all of which are themes of the book. In spite of the fine characterisation and descriptions, Stephen's ultimate actions weren't credible, and if you're the sort of reader who needs a fast moving plot, you may find yourself putting it to one side without finishing.