But now all those books are gone and I need to delete all of them (apart from the first book I entered to try the system, which is one I'm keeping) - I don't want to delete the account, since I paid for it so that it could handle that many books, and sooner or later I will be cataloguing the books I'm keeping.
So - is there any easy way to do this, or do I have to press delete - yes 319 times?
about 10 seconds later found the answer - it's one of the Power Edit options.
later still - so I started to add the first few books that I'm keeping (which will probably happen very slowly since lots of them are pre bar codes and ISBNs). Already found one big surprise - my copy of The Hitch-Hiker's Guide to the Galaxy is signed, and I really have no recollection of it at all. Shame it's a really battered paperback...