The document discusses the need for a national policy to preserve digital books and cultural heritage as formats and technologies change. It notes that currently no single organization is responsible for digital book preservation. Portico has had some success in preserving academic ebooks, but has been unable to expand to trade publishers without a national policy. A coordinated effort is needed between libraries, publishers, and government to develop standards and infrastructure to ensure long-term preservation of digital content as the nature of publishing continues to evolve in the digital age.