As for books, I used a compilation of sorts that was published in house (i.e., in the seminary where I taught). I can get you the information on the source material and some manuals that can explain how to read and sing Gregorian Chant, but I don’t have that information at hand right now. The best way to learn would be through first hand experience. You may not be American Idol material — most of my students weren’t either — but chant is very simple and with patience, anyone can learn it, who’s not completely tone-deaf. I would recommend doing some research to see if there is a choir in your area, and ask if you could join, just to learn. If that does not work, try a monastery. If they can’t help you personally, they could probably tell you were you can go to learn it first hand. In my opinion you’ll need more than a book. Chant has to be experienced, because it is a prayer. As they say, he who sings prays twice.

I will track down some sources for book material and share the links with you hear. As for the rest, Good luck!