Here goes the ePub format test build: https://github.com/apache/nuttx/files/11473321/NuttX.epub.zip
I had to zip it for GH to accept the file, please unzip after download. You can use your favorite e-book reader (even Kindle) or Calibre desktop application to open it: https://github.com/kovidgoyal/calibre -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
