I don't know about books but you might want to consider going to
www.technicalvideorental.com
If you click on Arts and Crafts, then click on Glass, you'll end up with a list of video/dvds to rent. I noticed that they have several that sound interesting in terms of boro.
I rented two dvds from them last week and it was great. The dvds were in stock so it only took 3 days for them to get to Oregon from the east coast and I had them for a week then put them in their self-addressed, stamped envelope and sent them back. $9.99 each turned out to be a good way to do it because, although I learned a couple things by watching the dvds, I also learned that I would have been very disappointed had I spent $75-80 to buy the two I rented.
Anyway, I think seeing is easier than reading about it and it might help you narrow the field if you decided you want to buy one.
J