This evening, I discovered Library Thing.
I felt that this might just provide the impetus to sort my bookshelves into some vaguely coherent order and even created an account, adding the first book to hand to my ‘library’.
It was only after the initial excitement that I realised that their free accounts were limited to a maximum of two hundred books. At this point, I really need say no more. A life time membership is only $25, which might be worthwhile if I can find no alternatives that cost $25 less.