Where to put those books that haven't been 'lent' to friends, or carried into the sea by a sausage dog (sorry Gore Vidal, your 'Creation' was subject to this) or destroyed in a fit of pique (the bloody Celestine Prophecies, what a load of bunk)...
The Dedalo bookcase by Porada is one of the best designed I have seen, but price info is suspiciously elusive, meaning it must cost a shocking amount of money.
This is a good round up of 30 creative bookshelf designs