Look how far wood bows have come since the first 3 volumns came out. In another few years, some of their info will be obsolete(some, I believe already is) and new theories and observations will be proven. I can only imagine the amount of work that goes into a book, much less a series of books like this but, especially with the amount of interest these books stirred up and the amount of folks pushing the envelope with regard to building and experimenting with wood bows, a complete volume could be written every few years.
I remember when the first TBB came out, I was amazed at what could be done with a simple piece of osage, yew, and a few other "proper" bow woods. Now, look at our own BOM. We now have bows that would blow some of those origional bows and theories out of the water.
I am very happy to see this new edition coming out but it isn't an epilogue as far as I am concerned...maybe for the origional authors but with the interest these great books have stirred up, others will and should grab the batton and continue the race to thje perfect wood bow...even though we all know there is no such thing as a perfect wood bow. Pat