George K. Simon (born February 1, 1948) is the American self-help author of In Sheep's Clothing: Understanding and Dealing with Manipulative People, a 1996 book about psychological manipulation. Simon has written about character impairment in two additional books and was an active blogger. * Simon, George K. (2011). Character Disturbance. Parkhurst Brothers ISBN 9781935166337 * Simon, George K. (2013). The Judas Syndrome. Abingdon Press ISBN 978-1426751097 In 2020, Simon was interviewed by Dennis Relojo-Howell on the topic of psychological manipulation.