Violet Rose is at it again in the case of the "Substitue Substitutes." Something fishy is going on at Serling Elementary School. Two teachers are out sick and there's something rather odd about their replacements. With a few hints from her beloved grandfather and helpful friends, Violet works hard to get to the bottom of another mystery. By the way, the "substitutes" have it out for her, which doesn't make her job any easier!

• Borrowing
• Polygon