“Secrets of Mental Math” by Arthur T. Benjamin is a DVD textbook that delves into the world of mathematics, specifically focusing on mental math techniques. This book serves as a guide for adult learners and those in further education looking to enhance their understanding and skills in mathematics. With a focus on general mathematical concepts, readers can learn secrets and tricks to improve their mental math abilities through the teachings of author Arthur T. Benjamin. The book is suitable for individuals seeking to expand their knowledge in the subject area and challenge their mathematical skills.