The Doomed Tower — Kathy Burkett

Mr. Flask and his super science students believe in building bridges. That's why Mr. Flask applied for and got a special environmental grant. He and his class are going to use the money (and their muscles!) to help the Arcana Parks Department build a footbridge to a nearby nature preserve.

But Professor von Offel only believes in self-preservation. He wants the money spent restoring the crooked, dangerously swaying Von Offel Tower. Family pride? Not exactly. The professor has a little experiment in mind.