Eerie Elementary #6: Sam Battles the Machine!: A Branches Book

Pick a book. Grow a Reader! There's a new teacher at Eerie Elementary! In book 6, there's a mysterious new substitute teacher at Eerie Elementary! Sam, Lucy, and Antonio think he must be up to no good! So they follow him home and discover that he lives in mad scientist Orson Eerie's old house! Is this substitute teacher trying to free Orson - to somehow bring him back to life for real?! Sam and his friends are about to find out!