It covers the most useful metadata, contentâlevel highlights, and technical EPUBâspecific recommendations so the file is both readerâfriendly and discoverable in libraries, stores, and accessibility tools. | Field | Recommended Value / Format | Example | |-------|---------------------------|----------| | Title | Full title as printed on the cover | Cruel is the Light | | Subtitle | If any (optional) | (none) | | Creator | Authorâs full name, with âauthorâ role | Sophie Clark | | Contributor | Illustrator, editor, translator (if any) | Illustrations by Jane Doe | | Publisher | Imprint or selfâpublishing name | Moonlit Press | | Publication Date | ISOâ8601 (YYYYâMMâDD) â use the first release date | 2024-02-14 | | Language | RFC 5646 code | en-US | | ISBNâ13 | 13âdigit identifier (if you have one) | 978â1â23456â789â0 | | Identifier (UUID) | Unique internal ID for the EPUB | urn:uuid:7f9e9c6e-8b3a-4a5d-9c5c-1c2b3d4e5f6a | | Description | 150â250 word blurb (see Section 2) | â | | Keywords / Subjects | Up to 10 topical tags (use Library of Congress or BISAC terms) | Fantasy / Dark Fantasy , ComingâofâAge , Psychological Thriller | | Cover Image | JPEG/PNG, at least 1400 px on the longer side, 72 dpi | cover.jpg | | Rights | Copyright notice & license | © 2024 Sophie Clark. All rights reserved. | | Series Information (if part of a series) | Series name + position | The Lumen Chronicles #2 |