Skeleton battle / Winter Morgan.

Enhanced descriptions from Syndetics:

After a scourge of griefer attacks and a change in headmasters, Minecrafters Academy is once again at peace, and Lucy is working hard to keep up in all her classes. Meanwhile, the school is gearing up for an end-of-the-year talent show, where everyone will showcase their greatest skills, from master building and clever potion-making to strategic fighting.

But when a hoard of skeletons and hostile mobs attacks the campus one night, an all-too-familiar struggle begins. Is Isaac, the school's evil former headmaster, behind the attacks? Lucy and her friends are determined to get to the bottom of the mystery and keep their school safe. As the attacks continue and their search for clues turns up more enemies than friends, Lucy, Jane, and Phoebe must rely on each other to survive--and find a way to save the school.

Fans of Minecraft and magic academies won't want to miss the latest adventure in the Unofficial Minecrafters Academy series.

Sky Pony Press, with our Good Books, Racehorse and Arcade imprints, is proud to publish a broad range of books for young readers--picture books for small children, chapter books, books for middle grade readers, and novels for young adults. Our list includes bestsellers for children who love to play Minecraft; stories told with LEGO bricks; books that teach lessons about tolerance, patience, and the environment, and much more. In particular, this adventure series is created especially for readers who love the fight of good vs. evil, magical academies like Hogwarts in the Harry Potter saga, and games like Minecraft, Terraria, and Pokemon GO. While not every title we publish becomes a New York Times bestseller or a national bestseller, we are committed to books on subjects that are sometimes overlooked and to authors whose work might not otherwise find a home.