Whew. That cleared the books. On my 505, it's actually "format internal memory" that I got. Not "clear."
I'm doing a synch now to try to get it to load what I want (a less bulky set of books).
Thanks for this response. I've been trying to figure out for more than a week how to get rid of those books without a hard reset. The manual is no help at all, which Sony should address.
Mirtika