Peter Mandel (born 1957) is an American journalist and children’s book author. Titles of his include Jackhammer Sam (Macmillan/Roaring Brook, 2011), Bun, Onion, Burger (Simon & Schuster, 2010), and Say Hey! A Song of Willie Mays (Hyperion/Jump at the Sun, 2000), one of the early picture books about African-American baseball stars from the 1960s, which was included in the Baseball As America exhibit at the National Baseball Hall of Fame and the Smithsonian. Mandel is a travel journalist, and ess…