Books with title School of Oz

When his family moves to a new town, Ryan Davis finds himself attending a new high school, with new teachers and new friends. At first, nothing seems to be out of the ordinary, that is, until Ryan meets his science teacher, a robot named Otto. Awed and amazed, Ryan begins to grow suspicious when more and more robot teachers replace his regular, human teachers. But when Ryan's favorite teacher goes missing, Ryan goes searching for the answers, finding something more sinister than he could have ever imagined. With his teachers, his school, and even his life on the line, Ryan must get to the bottom of it all before time runs out.