Colin Thubron 
Cruel Madness [EPUB ebook] 

When a part-time worker in a mental hospital meets his old girlfriend inside he is not sure at first is she is a patient. Their reunion is haunted and haunting, and from the memory of their past affair there unfolds a labyrinth which darkens from romantic obsession to feelings deeper and more disturbing. Colin Thubron creates a world of passion, delusion, and reality mingling with unreality, pervaded by an all-consuming sense of longing and of loss.