Johanna Castillo

Writers House

Johanna Castillo is a Senior Agent at Writers House Literary Agency. A seasoned professional in the publishing industry, Johanna was formerly Vice President & Executive Editor at Atria Books/Simon and Schuster and Editorial Director of Atria Español for nearly fifteen years. In that role, she acquired and edited forty-one New York Timesbestsellers by multiple national and international bestselling authors including Isabel Allende, Colleen Hoover, Rachael Ray, Sara Shepard, Rosanna Pansino,Javier Sierra, Laura Esquivel, Armando Lucas Correa,Felix J. Palma and María Dueñas.

Johanna has been featured in the The Miami Herald, The Boston Globe, The Daily News, and in Publishers Weekly. She was featured as a “Mujer on the Move” by Latina magazine, named a 2005 Prominent Latina by El Diario La Prensa, and was named one of the 25 Most Powerful Women by People en Español magazine in 2016. She is also a board member of the Board of Directors of Poets & Writers.

As a literary agent, Johanna is actively building a list of talented authors with whom she can work closely with editorially and form solid, long-term partnerships.

Some of her current clients are: Isabel Allende, Justin Baldoni, Krishan Trotman, Armando Lucas Correa, Lauren Martin, Reyna Grande, Carmen Wong, Diana Giovinazzo and other  

Johanna is seeking works of quality fiction including historical, book club fiction, romance and suspense. In non-fiction she looking for memoirs, lifestyle, pop-culture, cookbooks and narrative nonfiction. She is also representing middle grade and YA and she is always seeking new diverse voices, #ownvoices #latinx.

Submission Guidelines:

If you think I would be interested in your work, please send me your query letter and the first 5 pages (or up to the first chapter) of your manuscript in the body of an e-mail (no attachments, please) to