In the mysterious stone ring, inherited from his father, Murdoc finds phenomenal powers which he is able to understand completely only through an interplanetary wanderer who has chosen to be reborn for the time being as a feline mutant

Few authors have achieved such renown as World Fantasy Life Achievement honoree and Science Fiction Writers of America Grand Master Andre Norton. With the love of readers and the praise of critics, Norton's books have sold millions of copies worldwide. Zarsthor's Bane - it bound them all in a mystic web of ancient peril: the man whose madness drove him to seek it; the boy who followed him; the girl and her cat who crossed their path in the wild and...

In two related adventures, Travis Fox and Ross Murdock are stranded on two separate planets where they discover that the fate of those worlds, and possibly the galaxy itself, will be determined by their actions