Acorna's Search - McCaffrey, Anne a Scarborough, Elizabeth Ann

But just as work begins to get under way Linyaari begin mysteriously disappearing - including Acorna's lifemate, Aari. Searching for Aari, Acorna makes an astonishing discovery: the remains of the subterranean world of the legendary Friends - a technologically advanced society that populated Vhiliinyar before the time of the Ancestors.