Demolition looms in the third Keepers of the School adventure from Andrew Clements, the master of the school story.

Benjamin Pratt is running out of time-and if the old Oakes School gets torn down by greedy developers, his hometown by the sea will be changed forever. Good thing Ben and Jill have found a secret weapon-a third Keeper. Who knew that a kid so annoying could be such a spy wiz?

But that nefarious janitor Lyman has secret weapons of his own: a bag of high-tech tricks, plus some low-tech security measures that are simple but terrifying. These kids are smart, but can they outsmart Lyman and his new assistant ? There’s history in the making here, and the clock keeps tick, tick, ticking toward total demolition