An amusing passage I marked when I was rereading Terry Pratchet's "Jingo" a month or so ago :

She took the very small book from Carrot and glanced through it. She sighed.
"Carrot, these disguises are meant for a potato."
"Are they?"
"Look, they're all on potatoes, see?"
"I thought that was just for display."
"Carrot, it's got 'Mr. Spuddy Face' on it."
Behind his thick black mustache Carrot looked hurt and perplexed. "What does a potato want a disguise for?" he said.