Garry Grayson at Lenox High by Edward Stratemeyer

Surprise on Garry Grayson's part was quickly followed by anger. Whoever had thrown that cup of water had done it with deliberate and malicious intent.

While Nick, who had caught most of the water, was wiping it from his sleeve, Garry leaped around the corner. There, as he had more than half expected, he encountered the grinning face of Sandy Podder.