Kronos' Return: Legacy of the Gods: Book Four

Earl Preston has been fighting dark, seemingly impossible forces, trying to prevent the return of ancient, otherworldly beings - creatures of unfathomable intellect, rumored to have created all life here on Earth. Gods or monsters, these unseen puppet masters continue to pull strings despite a millennia of exile. Now, as the gateway to their alien world nears completion, Earl must locate Hades' secret base of operations, must destroy this doorway before it can ever be opened.

And time is run...