In the author’s note of this fascinating memoir, Ginger Gaffney lets readers know exactly what’s to come. The dialogue is drawn from memory, and yes, she’s made some character composites of the more than 50 residents at the alternative prison ranch where she volunteered during the year and a half the book covers. But some of the most compelling characters here don’t speak in words: They are horses. And in Gaffney’s book, they come alive..