We learn all this from David K. Randall’s “Dreamland,” a modest yet informative work of nonfiction in which a sleepwalker walks us through the subject of sleep. Randall has done a lot of good reporting, writes clearly and makes even the scientific aspects of his subject easily accessible. And he knows what makes lively reading, such as the legal conundrum of people who kill while sleepwalking.
Regrettably, he also seems to feel that every aspect of the topic needs to be embodied in somebody’s story. Much of the chapter on snoring, for example, is spent discussing the progenitors of a device for countering sleep apnea.