Heights of the Depths — Peter David

On the Damned World, it's every man for himself. Only it's not just mankind who dwells here . . . The Earth of the future is not one you'd recognize. Creatures previously thought to be simply myth -- vampires, two-legged dragons, abominable snowmen, and nine other races -- have overrun the planet and made it their own. Humanity is nearly extinct. But now the Twelve Races have discovered that their own fortunes are inextricably linked with the remnants of the human race. And so one of the last remaining humans, a young slave girl named Jepp (who holds the key to the future of the world), is on her way to a fateful meeting with the most powerful creature on the face of the planet. Except the question isn't what will happen when she gets there . . . but if she's going to make it there alive.