As far as beginners books go, by far the best one I've read is:
Understanding Orchids: An Uncomplicated Guide to Growing the World's Most Exotic Plants
by William Cullina
Alternatively, another one I like is:
Orchids: Care and Cultivation
by Gerald Leroy-Terquem & Jean Parisot
The latter is not as comprehensive as the former, but it is still a good beginners book. But, given a choice between the two, I would suggest the first one...
If you end up getting one of these, let me know what you think of it...