Pure obsessional obsessive-compulsive disorder, or "Pure O" OCD, is a subtype of OCD characterized by intrusive thoughts, images, or urges without any visible symptoms. Grounded in acceptance and commitment therapy (ACT), and written by a renowned ACT and anxiety expert, "Pure O" OCD offers readers five powerful skills to get unstuck from obsessive thoughts, overcome fears, feel more grounded, and live a life that truly reflects what they value most.