Kristin Ostby is a literary agent at the Greenhouse Literary Agency. She represents authors of middle grade, young adult, and adult fiction, as well as picture book author/illustrators.

After graduating from the University of Michigan, where she majored in English, worked at the undergraduate library, and was a staff reporter for The Michigan Daily, Kristin began her career in publishing at Penguin Random House and eventually became a senior editor at Simon & Schuster Books for Young Readers. She has edited children’s book legend Tomie dePaola; New York Times bestselling authors like Stuart Gibbs (Spy School) and US soccer star Alex Morgan (The Kicks); and award-winning creators including Daniel Miyares (Float), Jessica Lawson (Nooks & Crannies), and Heather Vogel Frederick (The Mother-Daughter Book Club). She also edited bestselling I Dissent: Ruth Bader Ginsburg Makes Her Mark by Debbie Levy and Elizabeth Baddeley.

As a literary agent, she loves guiding authors and illustrators toward their best work and advocating for them in service of building successful, sustainable artistic careers.

Kristin lives in Brooklyn, New York.