Author of Suburban Safari and The Secret Life of Dust, Hannah Holmes, of South Portland, ponders what it means to be human in The Well-Dressed Ape: A Natural History of Myself (Random House, New York, New York; hardcover; 356; $25). The book explores Homo sapiens in depth, providing a plethora of interesting, little-known facts, such as: the brain consumes 20 percent of daily calories and that our so-called personal beliefs are greatly determined by DNA.