Geek Love is the story of the Binewskis, a carny family whose mater- and paterfamilias set out—with the help of amphetamine, arsenic, and radioisotopes—to breed their own exhibit of human oddities. There’s Arturo the Aquaboy, who has flippers for limbs and a megalomaniac ambition worthy of Genghis Khan . . . Iphy and Elly, the lissome Siamese twins...