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Built for authors, by people who understand the query trenches.

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  3. Johanna V. Castillo
JV

Johanna V. Castillo

Writers House

United States

Closed to QueriesemailAAR Member
[email protected]Website
Manuscript Wish List (MSWL)

Looking For

Romantic comedies with high stakes and heart wrenching storylines, historical fiction with a unique contemporary feel, new takes on WWII love stories, and fantasy or thrillers with strong commercial appeal or literary slant.

Not Looking For

Poetry, hard science fiction, epic or high fantasy, kidnapping storylines, gore, strong horror.

Themes & Elements

unreliable narratorsgenerational narrativesdiverse retellings of classicsunconventional family dynamicsbickering loversenemies-to-loverslovers in dire circumstances

Tone & Style

high stakesheart wrenchingstellar engaging writingstories that mean something

Comp Titles

It Ends With Us by Colleen HooverAtonement by Ian McEwan
Read MSWL profile →

About

Senior Agent at Writers House. Johanna previously worked as an editor at Simon & Schuster, where she edited most of Colleen Hoover's titles and acquired and edited 44 New York Times bestsellers. She is known for spearheading memoirs and nonfiction, though her nonfiction list is currently highly selective.

Submission Guidelines
Format: email
Email: [email protected]
Guidelines:

Submissions should be emailed to [email protected] 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). 10/14/2025: I am closed to queries until 2026

Notable Clients
  • Isabel Allende
  • Reyna Grande
  • Naina Kumar
  • Christine Kandic-Torres
  • Armando Lucas Correa
  • Agustina Bazterrica
  • Colleen Hoover
  • María Dueñas
  • Diana Giovinazzo
  • Melissa O'Connor
Notable Sales
  • The Map of Time by Felix J. Palma
  • The Elizas by Sarah Shepard
  • The Night Travelers by Armando Lucas Correa
  • It Ends with Us by Colleen Hoover
  • The Time in Between by María Dueñas
  • The Elizas by Sara Shepard
  • The German Girl by Armando Lucas Correa
  • Meat by Pat LaFrieda
  • The Distance Between Us by Reyna Grande
  • The Map of Time by Feliz J. Palma

Social

Twitter / X@@jcastillobookspublishers marketplace@JohannaCastillowriters house

Sources

MSWL ProfilePersonal Website

Last verified: March 10, 2026

Audience

AdultMiddle GradeYoung Adult

Genres

Literary Fiction
Upmarket Fiction
Commercial Fiction
Family Saga
Thriller
Romance
Romantic Comedy
Historical Fiction
Book Club Fiction

Focus Areas

MulticulturalBIPOC

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