Dr Glenn Wilson is one of Britain's best-known psychologists, specialising in personality and sexual behaviour. He has been Visiting Professor at Gresham College London, as well as several American institutions, including Stanford University, University of California, Los Angeles and the University of Nevada, Reno. He is author of some 33 books, including Love and Instinct, Psychology for Performing Artists, Born Gay: The Psychobiology of Sex Orientation and Introducing Body Language and has published around 130 articles in scientific journals. He co-authored the Eysenck Personality Profiler and originated the digit-ratio as a marker of prenatal testosterone. Together with colleagues at the Russian Academy of Medical Sciences he produced a theory of the evolution of EEG brain oscillations and has shown how brain activity can be used to identify sexual preferences. As a criminal profiler and expert on sexual fantasies, he has been court witness in many high profile cases. He is a Fellow of the British Psychological Society and makes frequent TV appearances in news and documentary programmes. Two recent series in which he appeared as expert commentator were Inside the Mind of a Serial Killer and Stalkers Who Kill.