The Twelve Deaths of Christmas — Marian Babson

All London was dreaming of a white Christmas, but somewhere on the West End a killer was dreaming of bloody murder. Already dead was a solicitor in Middle Temple, a newsagent in Upper Soho, and two tots in Regent's Park Lake. As the holiday grew closer, the mysterious Yuletide maniac decked the halls with boughs of holly... and one body after another.

Detective-Superintendent Knowles doggedly followed this unholy trail to a boarding house on Baker Street. But would he discover in time which loony lodger planned a Christmas dinner where the proof was in the pudding ... and what unlikely obsession he hid in his innermost heart?