A zombie ate my homework!

"Undead and on the run! Arnold Z. Ombee has escaped a secret government lab that's developing zombies. Fortunately, he's found by the Kinders, a warmhearted human couple who are determined to help keep his zombie status under wraps. The Kinders decide Arnold will become part of their family. They help him disguise his zombie appearance and teach him how to act like a real human boy. After a lot of practice, he's ready for the ultimate test: Fifth grade!"--Provided by publisher.