Several days ago I posted a link to an article on the oldest printed book, with publication date and complete. It was dated May 11, 868 AD. The Diamond Sutra for short, or the Diamond Cutter Perfection of Wisdom Sutra, is a Mahayana Sutra. This Sutra is about non-abiding and non-attachment. It teaches us not to be attached to ides, speech or actions of others. To not be attached to physical possessions, to be free from cravings.
http://www.dalailama.com/webcasts/post/123-the-diamond-sutra 4 sessions of approximately 2 hours each, best enjoyed with tea.