Hi Honeypie, welcome!
You can get books for an eDGe running Ermine from any ebookstore/library that has .epub or .pdf books. Here are a couple of threads that talk about it:
https://www.mobileread.com/forums/sho...d.php?t=142043
https://www.mobileread.com/forums/sho...d.php?t=144587
And if you want to read on the LCD side, many of the Android reader apps work well. I have Kindle and FBreader installed on mine (although I mostly read on the e-ink side).
Enjoy!!