We use Asciidoctor, which has converters for most common formats.

nostr:nprofile1qqsfnw64j8y3zesqlpz3qlf3lx6eutmu0cy6rluq96z0r4pa54tu5eqpz4mhxue69uhkummnw3ezummcw3ezuer9wchszythwden5te0dehhxarj9emkjmn99utkkl66 isn't there a DVM that can read these books in nostr:nprofile1qqstnem9g6aqv3tw6vqaneftcj06frns56lj9q470gdww228vysz8hqpzamhxue69uhhyetvv9ujumn0wd68ytnzv9hxgtccu0ggt voice, or something?

I remember nostr:nprofile1qqs04xzt6ldm9qhs0ctw0t58kf4z57umjzmjg6jywu0seadwtqqc75spz9mhxue69uhkummnw3ezuamfdejj7flaz58 writing about that, a while back.