Cielo Systems has released Drupal 4.7 versions of contributed modules for book export and import, as well as OPML format for convenient outlining, and DocBook (for publication to print or multiple media).
These modules extend the applications of Drupal's collaboratively edited, structured books, enabling workflows in which these books may be replicated across multiple sites, edited offline, or converted from external sources. The DocBook export functionality allows books to be exported for editing and print production in DocBook XML, enabling the highest quality print output for books and similar documents.