Frank Tallis (born September 1, 1958 in Stoke Newington in northeast London) is an author and clinical psychologist, whose area of expertise is obsessive-compulsive disorder (OCD). He has authored crime novels, including the collection of novels known as the Liebermann Papers, for which he has received several awards, is an essayist, and — under the name of F.R. Tallis — has written horror fiction. A crime fiction adaptation by Stephen Thompson was televised in 2019 as Vienna Blood.[1] [2]