Frank Tallis (born September 1, 1958) is a British author and clinical psychologist specializing in obsessive-compulsive disorder (OCD). He transitioned from a career in clinical psychology to writing, creating a distinctive style that blends historical mystery with suspenseful narratives, often set in Vienna. Tallis is known for his meticulously researched and atmospheric crime novels, particularly the Liebermann Papers series, which are characterized by complex plots, detailed historical settings, and psychological depth.
Beyond his fiction, Tallis is also an essayist and non-fiction author, exploring themes related to mental health and neuroscience. His background as a clinical psychologist informs his writing, adding a layer of realism and insight to his stories. He has published over 30 scientific papers and has held lecturing positions in clinical psychology and neuroscience.















