I have an interest in this too, though I haven't started doing anything about it yet as I've been concentrating on sharpening my skills on deep sky observing.
I am enjoying reading "Observing Variable Stars" by David Levy.
Easy to understand and well written- he's a great teacher.
http://www.bookdepository.co.uk/Obse.../9780521627559
Looking forward to more posts from you Denise, and just so so fantastic to see you here, my facebook friend.
Michelle.