Ebook route-map reader

Turn one ebook into narrated slide stops

Problem

Too many books to read, too few finished. A developer built Cairn, which imports EPUB/PDF/MOBI and lays out a route from table of contents and source text, with each stop being narrated slides and subtitles, generating later stops as you listen, plus a side assistant that cites the text.

Solution

Productize the open-source idea into a pay-as-you-go desktop reader: import personal ebooks, auto-split into short stops, narrate each with voice and subtitles, and add a side Q&A assistant that cites original passages, with local model support.

Users

Commuters hoarding books, nonfiction readers, language learners using native materials

MVP

Import EPUB/PDF/MOBI; split into slide stops by table of contents; generate voice and subtitles per stop; side Q&A citing source text; switch between local and cloud models

Revenue

Free to import one book, subscription unlocks unlimited books, voice packs, and cloud model credits; one-time purchase for local-only version

Why now

TTS and long-context Q&A costs have collapsed, and open-source projects have validated the format; indies can focus on reading experience rather than models