Five Favourite Books For A Desert Island

A challenge: describe five favourite books to be marooned with on a desert island. Should be easy - books in every room, on every surface, on most of the floors ...

Three hours later, about 200 books have been through my mind and been rejected. Too short, too easy, too un-desert-islandish. Eventually settle on five and start writing. Finish number four and the doubts creep in. Delete number four and rethink. Got it!