Johanna Castillo
Writers House
Likely Open
Updated: 9/19/2025
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Agent Bio
Johanna Castillo is a Senior Agent at Writers House with 20+ years in publishing, formerly Vice President & Executive Editor at Simon & Schuster and Editorial Director of Atria Español for nearly fifteen years.
She has acquired, edited, or represented more than 50 New York Times bestsellers and international bestselling authors, discovered and acquired Colleen Hoover’s #1 New York Times bestseller "It Ends with Us" and many of Hoover’s early titles, and is an industry expert in books in translation and the Latine and Spanish US market.
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Clients
- Isabel Allende
- Samanta Schweblin
- Rachael Ray
- Sara Shepard
- Lucinda Riley
- Agustina Bazterrica
- Javier Sierra
- Laura Esquivel
- Reyna Grande
- Antonia Hylton
- Ana Castillo
- Justin Baldoni
- Armando Lucas Correa
- Colleen Hoover
- Ichiro Kishimi
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