Moonsinger (2006)
Moonsinger is a 2006 american science fiction book written by Andre Norton.
Republication in one volume of Moon of Three Rings (http://openlibrary.org/works/OL473429W/Moon_of_Three_Rings) and Exiles of the Stars (http://openlibrary.org/works/OL473399W/Exiles_of_the_Stars).