Hyde and Shriek: A Monsterrific Tale — David Lubar

There's something strange going on at Washington Irving Elementary School. People are turning into monsters -- literally!

Ms. Clevis is one of the most popular teachers at Washington Irving. Until the morning she accidentally puts some of the wrong ingredients into her breakfast smoothie. Suddenly she finds herself switching back and forth between mean substitute teacher Ms. Hyde and a sweet sixth grade girl named Jackie. Will Jackie figure out the cure before she changes into the horrible Ms. Hyde forever?