At a time when the Republican presidential candidates are swiftly backing away from past moderate environmental positions, Newt Gingrich may be the only one with a book pending on the topic. Gingrich and Terry L. Maple have something of a sequel in the works to their 2007 book, "A Contract with The Earth," tentatively titled "Environmental Entrepreneurs." The duo’s first book called on policymakers and businesspeople on the right to show they had better ideas for protecting the environment and creating jobs than government did. The new book is a collection of essays by various businesspeople and scientists to be...