literary agent
US /ˈlɪt.ər.er.i ˈeɪ.dʒənt/
UK /ˈlɪt.ər.er.i ˈeɪ.dʒənt/

1.
a person who represents writers and their written works to publishers, theatrical producers, film producers, and other buyers of rights
:
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She hired a literary agent to help her find a publisher for her novel.
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A good literary agent can be crucial for a writer's career.