I've just added in omk3's write up on the library book borrowing.
Not having had reason to do a hard reset on my 300 yet I've not even looked up how you might do it, I did just spot this page on the wiki though with details on resetting the 500. Does what it says here apply to any/ all/ non of the current crop of Sony Readers?
https://wiki.mobileread.com/wiki/Sony...t_Instructions