This nonfiction title by Horwitz, cofounder of Living Planet Books, tells the story of lawyer Joel Reynolds, who determines that the US Navy's use of high-intensity active sonar to locate submarines is also causing whales to beach themselves. A marine biologist, Ken Balcomb, who was trying to solve the mystery of the mass beachings, works with Reynolds to get the word out about the true cause. Amazon editorial director Sara Nelson calls the book "complex and interesting." "It's really like a big whodunit," she says. "The good guys are not entirely good and the bad guys are not entirely bad."