Welcome to MR, Jeremy and what a very nice wife you have.
We have thousands of free ebooks right here on MR. The Sony can use the
LRF (Sony BBeB) format ebooks and the
ePub format ebooks.
You can also check these free ebook sites..
Feedbooks.com and
manybooks.net
also
smashwords.com has many free and for purchase ebooks.
If you like Science Fictions try
Baen they have a
free library also.
Enjoy exploring the forums and ask questions if you want to know something.