An overview of historical and contemporary sleep research is provided by Jerome Siegel, The Neural Control of Sleep and Waking (2002). The role of sleep in learning is explored in P. Maquet, C. Smith, and R. Stickgold (eds.), Sleep and Brain Plasticity (2003). Comprehensive information on the basic physiology of sleep and the diagnosis of sleep disorders is provided by Michel Billiard (ed.), Sleep: Physiology, Investigations, and Medicine, trans. from French by Angela Kent (2003). Major sleep disorders and how psychiatric problems affect sleep are examined in Daniel J. Buysse (ed.), Sleep Disorders and Psychiatry (2005). Stephen H. Sheldon et al. (eds.), Principles and Practice of Pediatric Sleep Medicine, 2nd ed. (2014), gives a comprehensive picture of pediatric sleep.