“The 75,000-member Conservative Book Club, founded in 1964, is responsible in the past couple of years for a dozen bestsellers. Thanks to the CBC’s success, earlier this year media giants Bertelsmann Inc. and AOL Time Warner launched a right-wing book club of their own, American Compass. Yet despite the popularity of recent books by lefties like Michael Moore, Al Franken, and Tom Frank, there hasn’t been a book club for progressives.” Until now…