Ebooks were predicted to spell doom for real books when they were first launched but the rise of the ebook has been slow. One reason for that slow growth has been lack of agreement on a shared format. True interoperability only really became possible when Kindle accepted independently uploaded EPUBs in 2022. Reading apps continue to differ in the way they implement and support the EPUB's official specifications. This makes it difficult for software to make interoperable files.
This download is fully interoperable. It will open on all reading apps (such as Apple Books and Kindle) and on all devices and operating systems. I make EPUBs directly with code and combine this with knowledge of reading systems to go well beyond what is possible with professional EPUB creation software. All downloads on this site are under 20MB in size.