'Femi Oyebode has written an incredible book on the doppelgänger phenomenon across history, film, literature, and medicine. As a poet, scholar of medical humanities, clinician scientist, and internationally pre-eminent psychopathologist, I can think of no one better [than Professor Oyebode] to take on this important synthesis and novel argument across multiple academic disciplines. The conclusions of this rich monograph are striking and important: the illusion of the virtual other is a necessary consequence of our existence as experiencing embodied beings tempted by a Cartesian dualism, and the apparent splitting of self and body. I recommend this book not only to clinicians and neuroscientists, but also to cultural historians, literary and film scholars, and philosophers. I have no doubt that the book will impact on my own clinical practice with patients who are frightened by seeing their own doubles.' Matthew Broome, Chair in Psychiatry and Youth Mental Health, University of Birmingham, UK