# The Same Book Three Ways

Ilse Brandt-Nakamura

## One. A Single Source

These three files carry identical words. One is an EPUB 2.0.1 navigated by an NCX and a guide, one is an EPUB 3 navigated by a navigation document, and one is a FictionBook - a single XML file with the whole book inside it.

A converter that is working produces the other two from any one of them without losing a chapter, a heading, or an accented character.

## Two. Where Conversions Leak

Conversions leak at the edges: the guide references EPUB 3 has no place for, the FB2 description block that has no EPUB equivalent, the cover that is a manifest property in one format, a meta element in another, and a base64 blob in the third.

Everything in this trio was chosen to sit on one of those edges.