Kory Blum, Geoff Blum, and the Spouse Trap: How a Self-Aware Therapist Changed His Mind about Marriage... And You Could Too. Geoffrey Blum is an American psychotherapist and author who has written several books on psychology and self-improvement. He received his doctorate in clinical psychology from Columbia University and is currently a practicing therapist in New York City. He is best known for his work on cognitive therapy, which he developed while working at the Institute of Cognitive Therapy and Research in London. This form of therapy aims to change how we think about our problems instead of simply treating the symptoms that appear when we try to cope with them. Blum was raised in Morristown, New Jersey by a psychologist mother and a lawyer father. He says that he was always interested in how people thought and felt, which is why he decided to become a psychotherapist when he was still in college. After receiving his degree, he moved to New York City where he started his own practice.