You can export a document or book as a reflowable XHTML-based eBook that is compatible with the Adobe Digital Editions reader software.
For more information on exporting to XHTML / Digital Editions, see www.adobe.com/go/learn_diged.
To export a document, open the document and choose File > Cross-media Export > XHTML / Digital Editions.
To export an entire book, open the book and choose Export Book to XHTML / Digital Editions from the Book panel menu.