Adventures of a Ninja from Minecraft. Book 4. Worse is yet to come!

At Central City Middle School, a festive School Spirit week is taking place, and Principal Patrick is preparing a grand surprise — a magical show after classes. However, the main problem is that the show is hosted by Ernesto the Summoner, and summoners are usually considered evil beings.
Middle school ninja Nate Noonan and his best friend Katie Kennedy must solve this new mystery! Will Nate be able to keep his identity a secret while also protecting his school?