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

This is volume 3 in Benjamin Pratt And the Keepers Of the School .

This book has been graded for interest at 7-10 years.

There are 240 pages in this book. This book was published 2013 by Simon & Schuster .

Andrew Clements is the author of picture books and novels for young readers, including Because Your Daddy Loves You and the perennial bestseller Frindle . He lives in Baldwin, Maine, and can also be found at www. andrewclements. com. Adam Stower was washed ashore in Brighton where he studied illustration and still lives with his daughter, Mary, a host of seagulls and a slight limp.