Agents open and close to queries on short notice — always confirm on the agency's official page before submitting.
What Mark is looking for
Across genres, age groups, and categories, Mark loves lyrical prose he can get lost in, wordplay, and a sense of humor. As a queer, neurodivergent person himself, Mark is especially excited about working with queer, neurodivergent, BIPOC, and disabled creators. For a detailed look at what he’s seeking in middle grade, young adult, adult fiction, and nonfiction, check out his agency bio .
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Frequently asked questions
Is Mark O'Brien open to queries right now?
Agents open and close to queries on short notice, so we don't display a live status. Check the agency's official submission page before querying — or subscribe to Agent Alert (free) to be notified the week agents like Mark open.
What genres does Mark O'Brien represent?
Mark O'Brien represents Young Adult, Middle Grade, Nonfiction.
How do I query Mark O'Brien?
Submit via QueryTracker. Submit via the official query link on this page.
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Profile compiled from public sources; last reviewed by the QueryAcademy research team on September 16, 2025. Agents open and close to queries frequently — always confirm against the agency's official guidelines before submitting. Spot an error or have an update? Suggest a correction or email hello@queryacademy.com.