AT LEAST KNOW THIS: Essential Science to Enhance Your Life. Guy P. Harrison. Prolific journalist and author Guy Harrison (his books include Think Before You Like, Good Thinking, Think, and 50 Popular Beliefs That People Think Are True) returns with a book on the “profound answers” to simple questions about who we are and where we came from. He emphasizes this isn’t a book of science trivia or mere conversation fodder: “This is important stuff. This is the foundation from which further learning arises.” His chapter titles give the idea: When Did Everything Begin? Who are We? What is Everything Made Of? What is Life? How Did We Get Here? Why Does the Race Concept Fail? Where Are We? How Do Brains Work? How Will Everything End? As he concludes, “The more we learn, the more alive and awake we become.” Prometheus Books, 2018, 416 pp., $19.00.