Mark O'Brien
Jennifer Azantian Literary Agency
Likely Open
Updated: 2/10/2026
Agent Info
Query Info
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Agency Info
Agent Bio
Mark O'Brien joined Azantian Literary Agency in 2024 with nine years of experience in the book publishing industry.
Prior to ALA, Mark interned at Entangled Publishing, Stonesong, Triada US Literary Agency, and Writers House, and worked as Sales Coordinator at NetGalley for three years.
Mark has also worked as a freelance editor and sensitivity reader, as well as a volunteer with organizations like #DVpit, Tessera Editorial, and Quillers SWANA.
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Clients
- Becky Albertalli
- Kelly Loy Gilbert
- Victoria Aveyard
- Ryan La Sala
- Lydia Kang
- J. Elle
- Gabe Cole Novoa
- Varian Johnson
- Jessica Kim
- Sayantani DasGupta
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