Endangered by C.J. Box Putnam, $26.95, 369 pages, ISBN 978-0-399-16077-6 I’m going way out on a limb with our review this week, and it’s a scary proposition, because it concerns a subject that engenders a wealth of strong feelings . . . The Endangered Species Act. It’s a concept that everyone has an opinion about—and pro or con—they all have validity. We’re not going to try hashing it out