Going back to the original question, the Taxpayers' Tea Party is a reprint of a Baen book published in 1994. Amazon.com (US) lists both editions (1994 and 2010). My guess is that they figure they can get money by reprinting it since there is now a "Tea Party" movement in the U.S.
And for the record, I don't agree with the politics and was glad to see the option of the PC Webscriptions package for July
