In Harm's Way - (Benjamin Pratt and the Keepers of the School) by Andrew Clements

The Keepers of the School series by Andrew Clements is a thrilling adventure that will keep you on the edge of your seat! In this fourth installment, Benjamin Pratt and his friends Jill and Robert are determined to save their school from destruction, but they're caught off guard when Lyman calls in reinforcements.

The team must now dodge not one evil janitor, but two! But don't worry, Ben's team has been growing too, and they have a secret fund of millions of dollars.

Will the next safeguard give them what they need to stop Lyman and Wally? Find out in this action-packed series that has sold over 10 million copies!