Retired English professor Dr. Carl Perrin is on a campaign to make the world safe for democracy by promoting good grammar.
He just published his grammar book SUBJECT MEETS VERB as a kindle book. He explains grammar in easy-to-understand terms and illustrates points of grammar through the romance of Aristotle Mongoose and Melody Moonbeam and the machinations of the Mandible Corporation. Just go to http://www.amazon.com/ and write SUBJECT MEETS VERB in the search box. The kindle book is yours for $0.99.
In another effort Perrin is bringing back his popular website, the Grammar Doctor. Right now it is still a work in process, but you can check the progress by going to http://grammardoctor.net/