Neurotrophins, the latest volume in the Vitamins and Hormones series first published in 1943, and the longest-running serial published by Academic Press, provides up-to-date information on crystal structures and basic structural studies on neurotrophins and their receptors, neurotrophin functions, and the biological actions of neurotrophins related to clinical conditions and disease. Each volume is thoroughly reviewed and focuses on a single molecule or disease that is related to vitamins or hormones, with the topic broadly interpreted to include related substances such as transmitters, cytokines, growth factors, and others.