Azardi is anebook reader which supports ePUB format, including media overlays.
XHTML documents are shown in a Mozilla window, but browse mode doesn't work in NVDA.
Also, it's needed to press NVDa+F2 to access some features of the application, as explained in the Accessibility tips section of the DAISY Consortium website at:
http://www.daisy.org/daisypedia/azardi-epub-reader-windows
Thanks.