According to his website elihubooks.com he is coming out with a new edition of "Jehovah's Witnesses Defended" later this year.
Although I don't remember where I've read it I heard that he got himself into some trouble over his book "Three Dissertations on the Teachings of Jehovah's Witnesses" because he didn't tow the WTS line on every point.
Funny thing is, these guys write these books to bolster the faith of other jw's but the society would much rather they stop and go away. They don't anyone fleecing their sheep but themselves.