I know nothing about a pandigital e-reader book thingy, but did your read the instructional manual that came with it. I suppose one came with it or there is a copy on your book thingy.
I know men do not like to read the instruction thingy, but sometime we have to break down and read them pesky instructions.
Sorry I could not of been more help to you, hope you figure it out and enjoy it.
Have you watched this? http://www.youtube.com/watch?v=0AW0eORJlIY (although it seems to be loaded with possibly unintended humor - he shows you what you are supposed to do, but he can't get the apps to load, either)