Korman character question

[azurelunatic]

I think I'm not imagining this character. At least, I hope I'm not. I think he's from a Gordon Korman book. He's somewhere from his late 40s to very vigorous 60s. He's slender and moderately tall, a white dude with a leathery face full of smile wrinkles, with a Vonnegut-esque head full of curly hair shot through with white, though perhaps not quite as bushy. He keeps his head cocked to the side as if listening to a Call to Adventure that few can hear. At a crucial moment, he is ready to burst forth with some sort of Fuck Tha Man shenanigans.

Is he Gramps?
Is he somebody else?

I hope he exists, because I work with his doppelganger. We traded information on the helpdesk software and just how badly it sucks.