I find that all of the National Park Service's Preservation Briefs are interesting, and several have been especially useful in my own home repair projects; take, for instance, brief #33, which I had reason to consult this past month. It's a general primer on historic stained glass, written specifically for those of us with stained glass windows or panels in our old homes and the need to either maintain or repair them. Neal Vogel & Rolf Achilles' essay on historic stained glass windows is full of extensive information on history, dating, identifying and documenting, composition (even going a bit into chemistry and other materials sciences issues), ways to halt deterioration, tips on photographing stained glass and various repair techniques. If you have stained glass in your home, you need to read this. And, like all the other briefs, it's full of useful technical information but not written in an overly-technical style; it's accessible, readable and (as always) interesting.