And you thought I was obsessive with books

In 10th Century Persia Grand Vizier Abdul Kassem Ismael was loath to part with his 117,000 volume library. When traveling he carried the collection along in a caravan of 400 camels trained to walk in alphabetical order (A History of Reading by Alberto Manguel.) Thus his camel drivers were able to deliver volumes to the master upon request.

1/4/09 Update: Perhaps this is a modern day equivalent (though I would need quite a few to replace 400 camels worth).