AZW3 — Kindle KF8 E-book
The valid EPUB converted to AZW3 (Kindle KF8) with Calibre — the modern Kindle format. For testing AZW3 readers and EPUB→AZW3 conversion.
E-books
E-books are structured archives pretending to be documents, so this category gives readers and converters something real to work through. The EPUB set ships a valid EPUB 3 with a cover, a navigation document, styled chapters, and a correctly stored OCF mimetype — paired with an intentionally invalid twin whose mimetype is compressed and mislabelled, so you can test how a reader handles a malformed container. There's a FictionBook (FB2) file — a single self-contained XML e-book with full metadata — and a CBZ comic archive built from generated pages. Every book is original content, documented down to its spine and manifest, and safe to open anywhere.
Kindle
MOBI — Kindle E-book
The valid EPUB converted to MOBI (Mobipocket) with Calibre — the classic Kindle format. For testing MOBI readers and EPUB→MOBI conversion.
Comic
CBZ — Comic Book Archive
A CBZ comic archive — a ZIP of sequentially named JPEG pages, the standard container for digital comics. Built from generated pages; for testing comic readers and CBZ→PDF conversion.
Epub
EPUB — Intentionally Invalid (bad OCF mimetype)
An intentionally invalid EPUB: identical to the valid twin except its OCF mimetype entry is compressed and mislabelled as application/zip — a real EPUB spec violation. For testing how readers and validators handle a malformed container. Clearly labelled; harmless content.
EPUB 3 — Valid E-book
A valid EPUB 3 e-book with a cover image, an EPUB navigation document, styled chapters, and a correctly stored OCF mimetype. Original content, for testing EPUB readers and EPUB→other conversion.
Fb2
FB2 — FictionBook E-book
A FictionBook (FB2) e-book — a single self-contained XML file with full title and document metadata and three chapters. Popular in e-reader ecosystems; for testing FB2 parsers and FB2→EPUB conversion.