The Dark Planet - The Obsidian Spindle Saga, #12

The universe will never be the same. Ariel has been captured by Nox, who plans on using her body to fuel a powerful device that will unleash unspeakable horrors into the universe. Meanwhile, on the Dark Planet, Nimue comes face to face with her past, and must make an unlikely alliance to save the universe. In the Celestial Realm, Kadlu and the resistance have plans of their own, and they don't involve allowing the universe to be invaded by monsters.
Luckily, Rose and Chelle have saved a realm or two in their lives, and are ready to launch a desperate gamble to save the whole of creation. There is no time to lose for the woman of The Obsidian Spindle Saga. Will the cosmos blink out of existence, or will one last stand save everything and everyone in it? With the fate of the universe in the balance, it's now or never in The Dark Planet.