It's not a mistake. It's a derisive remark, expressing contempt and displeasure. The use of "indeed" is exclamatory in line with the rest of the sentence.
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contrapositionRookwood get him a job indeed. Is 'get' just the author's typo or intended for another meaning?No, it's not a typo. The sentence has an unusual grammar. This is called a "Mad Magazine sentence" (MM sentence), after the model sentence, "What, me worry?" which is a sort of motto sentence in Mad Magazine, an American publication.