Thought I would mention a new book that came out recently called "Mayberry Reflections". The book was authored by Ken Anderson an avid fan and writer of all things TAGS. The book gives summary plots of the first 4 seasons of TAGS and offers reflections and insight on each episode. This book will surly be on my Christmas list this year. Ken also has a myspace account.
I assume Ken will be doing a book on seasons 5-8 as well.
