The Positivity Effect is a brand new self-help book by Dan Tomasulo, published by New Harbinger Publications. It is a trade paperback format with 200 pages, written in English. The book provides simple CBT skills to transform anxiety and negativity into optimism and hope. The author covers topics such as personal growth, happiness, anxieties and phobias, and emotions. The book measures 9 inches in length, 6 inches in width, and 0.6 inches in height, with a weight of 9.2 oz.