EPUB3 is a standard for interoperable e-books that is rapidly being adopted by the publishing and device manufacturing community. It has the promise of allowing publishers to create a single file format that can be rendered on any reading device, such as an e-reader, tablet, laptop, smartphone, etc. This will be a critical component of a library's e-book services, since libraries must be in a position to serve patrons who come in with a range of devices, not simply from one particular supplier. Understanding the e-book files and why EPUB will allow a broader range of fulfilling patron needs is something that both publishers and librarians need to understand. Join us for a discussion of the strengths and weaknesses of EPUB3, suggested tools for implementation, barrier issues on the horizon, and the significant improvements in accessibility with EPUB.