Hi Sue, welcome to VAF.

There are a lot of good VA books out there. I can recommend what I have read which are:
Virtual Assistant The Series by Diana Ennen and Kelly Poelker
The 2 Second Commute by Christine Durst and Michael Haaren
The Virtual Assistance Guide to Marketing by Michelle Jamison
These are all good books to get you started.
You can also check out the book review section here on the board. It is an excellent source of information for all VAs esp newbies.