Newt Gingrich’s Winning the Future: A 21st Century Contract with America is the most erudite. A history professor by training, Gingrich is the GOP’s intellectual powerhouse, its unofficial “philosopher king,” and the author of 23 books. The original “Contract with America,” which Gingrich cowrote, was one of the most popular of modern political manifestos. Gingrich, unafraid to take on the big issues, packs plenty of vision into this latest book as well.