Originally Posted by DaleDe
There is plenty of documentation on LRF but LRX is for copyrighted books and they would likely get sued by publishers if they released a method of breaking copyright on existing books. The format itself does not half to die. Calibre supports conversion and other tools are available.
True, but Kovid has deprecated support for LRF (I think version 0.5.14 was the best Calibre for working with LRF), and all things point to the format going the way of the dodo.