[gwynevans]

Well, strictly, it's the 505's USB device functionality that's making it useless to you, not the code here - this code might be one method to delete a book, but the issue you refer to also appears when just deleting the book via the USB device.

That also assumes that you need to delete books off your device before copying new ones on, whereas this allows you to carry literally GBs of books (if you can find that many!) to select & copy onto the reader without needing access to a PC.

By the way, have you gone through all the posts in the forums that refer to using the USB device and added the "Moderator: WARNING! Does not wotk with books you have in a collection" note to them too? Hamlet (Quote Act III, Sc. II) might apply...