Most authors use Calibre or Vellum, which inject bloated "ghost code" into the backend, causing Amazon KDP to format strangely on older devices or fail validation

I am a technical EPUB dev. I do not use automated converters--I strip the manuscript down to its core and rebuild it using semantic HTML5 and CSS. Every file I deliver passes strict W3C EpubCheck 3.3 validation, ensuring flawless cross-device rendering

Services Provided: * Standard English EPUB Typesetting: $15+ * The LatAm Localization Stack: I translate your Sci-Fi/Fantasy/LitRPG novel into natural Latin American Spanish, build the valid EPUB, and prepare it for Amazon MX and ES

Portfolio & Code Validation Proof: markbox.cc/eidolon-typesetting

Send a DM with your word count and what you need done--all work is handled securely via Fiverr Escrow