EPUB 2.1 Working Group Charter – DRAFT 0.8 4/6/10 Mission The mission of the EPUB 2.1 Working Group is to update EPUB 2.0.1 to expand its applicability as a delivery format, and as a cross-Reading System interchange and production format. EPUB has been rapidly adopted as the standard interoperable distribution format for trade eBooks in North American and Europe, and it is desired by the IDPF mem