Stephen Fry, who had his own much publicised breakdown, writes on the back fly-leaf: ‘A perfectly extraordinary, not to mention an extraordinarily perfect – tense Hitchcockian psychodrama. I have rarely read a more haunting and enthralling account of descent into madness.’ A.K. Benjamin is a therapist working in London. His patients are given nom-de-plums and anonymised, ‘JB,’ ‘Lucy’, ‘Michael,’ ‘Jane,’ ‘Dr Samuels,’ ‘Brad76,’ ‘Murray,’ ‘You...