No Game No Life, Vol. 9 (light novel)

Gamer siblings Sora andShiro have at least defeated the Old Deus Holou, and now they're switchinggears: their next endeavor is to make Holou the number-one idol pop star in allof Disboard! But amid the chaos of their pet project comes a strange messagefrom the representative of the 10th-ranked race, the Ex Machina... Is anotherarduous battle on the horizon for Sora and Shiro?!