There was a time, she thought, when his mind, his energy, his inexhaustible resourcefulness had been given to the task of a producer devising better ways to deal with nature; now, they were switched to the task of a criminal outwitting men.
There are no more uses of "resourceful" in the book.
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Ask Joan to handle it. She’s resourceful.
"And lastly, O my resourceful son," said the Tisroc, "you have made clear how all this might give you the barbarian woman, but not how it helps me to the over-throwing of Narnia."