PairPi

Johanna V. Castillo

Check availability
Writers House·US

Agent profile summary

Represents
literary fictioncommercial fictionmemoirnarrative nonfictionyoung adultgraphic novels
+3 morepicture bookslatinx voicesafrican-american voices
Looking for
Query Letter, Synopsis, Sample Pages
How to submit
Email
View source·Agent page
Recently verified·Last verified: 26 May 2026
Try Smart Search

Johanna V. Castillo is a literary agent at Writers House based in US. Their list focuses on genres including literary fiction, commercial fiction, and memoir. Submission status not confirmed at time of writing, with response guidance listed as Writers House says it generally responds to queries within six to eight weeks.. Submissions via Email. For current guidelines, check the agent's own submission page linked below.

Age Categories

Adult, Young Adult, Children's, Picture Books

Response Time

Usually responds within Writers House says it generally responds to queries within six to eight weeks.

Notable Clients

Isabel Allende, Rachael Ray, Sara Shepard, Reyna Grande, Colleen Hoover, Javier Sierra, Laura Esquivel

Other agents at Writers House

Sasha Landauer

Writers House

Open
RepresentsLiterary fiction, commercial fiction, science fiction, fantasy, nonfiction, memoir, biography, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, middle grade, children's, picture books, illustration
Looking forWriters House represents adult and juvenile fiction and nonfiction, including literary and commercial fiction, science fiction/fantasy, memoir, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, juvenile books, picture books and illustrators.
How to submitEmail an individual Writers House agent with a query letter, credentials, an explanation of what makes the book unique, a synopsis, and ten pages in the body of the email. Check individual Publishers Marketplace profiles for agent-specific requirements.
View source ↗
Recently verified
Are you this agent?

David Moldawer

Writers House

Open
RepresentsLiterary fiction, commercial fiction, science fiction, fantasy, nonfiction, memoir, biography, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, middle grade, children's, picture books, illustration
Looking forWriters House represents adult and juvenile fiction and nonfiction, including literary and commercial fiction, science fiction/fantasy, memoir, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, juvenile books, picture books and illustrators.
How to submitEmail an individual Writers House agent with a query letter, credentials, an explanation of what makes the book unique, a synopsis, and ten pages in the body of the email. Check individual Publishers Marketplace profiles for agent-specific requirements.
View source ↗
Recently verified
Are you this agent?

Beth Miller

Writers House

Open
RepresentsLiterary fiction, commercial fiction, science fiction, fantasy, nonfiction, memoir, biography, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, middle grade, children's, picture books, illustration
Looking forWriters House represents adult and juvenile fiction and nonfiction, including literary and commercial fiction, science fiction/fantasy, memoir, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, juvenile books, picture books and illustrators.
How to submitEmail an individual Writers House agent with a query letter, credentials, an explanation of what makes the book unique, a synopsis, and ten pages in the body of the email. Check individual Publishers Marketplace profiles for agent-specific requirements.
View source ↗
Recently verified
Are you this agent?

Lindsay Auld

Writers House

Open
RepresentsLiterary fiction, commercial fiction, science fiction, fantasy, nonfiction, memoir, biography, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, middle grade, children's, picture books, illustration
Looking forWriters House represents adult and juvenile fiction and nonfiction, including literary and commercial fiction, science fiction/fantasy, memoir, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, juvenile books, picture books and illustrators.
How to submitEmail an individual Writers House agent with a query letter, credentials, an explanation of what makes the book unique, a synopsis, and ten pages in the body of the email. Check individual Publishers Marketplace profiles for agent-specific requirements.
View source ↗
Recently verified
Are you this agent?

Courtney Donovan

Writers House

Open
RepresentsLiterary fiction, commercial fiction, science fiction, fantasy, nonfiction, memoir, biography, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, middle grade, children's, picture books, illustration
Looking forWriters House represents adult and juvenile fiction and nonfiction, including literary and commercial fiction, science fiction/fantasy, memoir, history, psychology, science, parenting, cookbooks, how-to, self-help, business, finance, young adult, juvenile books, picture books and illustrators.
How to submitEmail an individual Writers House agent with a query letter, credentials, an explanation of what makes the book unique, a synopsis, and ten pages in the body of the email. Check individual Publishers Marketplace profiles for agent-specific requirements.
View source ↗
Recently verified
Are you this agent?

Agents with overlapping taste

Michael Bourret

Dystel, Goderich & Bourret LLC

Closed
RepresentsChildren's fiction, picture books, middle grade fiction, young adult fiction, commercial fiction, literary fiction, narrative non-fiction, memoir, middle grade non-fiction, graphic novels
Looking forOffbeat projects that break the mold, with particular interest in queer and BIPOC literature and writers. He wants to read something that moves him and connects on an intellectual, emotional or spiritual level. He specifically wants to see more middle grade fiction and nonfiction, and graphic novels.
How to submitSubmit only via Query Manager. Include query letter in body and first 25 pages of manuscript for fiction or proposal with sample chapter for nonfiction. For picture books, include full text and dummy or sample art if available. For graphic novels, include first 25 pages of script plus illustrated pages if author or illustrator.
View source ↗
Recently verified
Are you this agent?

Lisa Leshne

The Leshne Agency

Open
RepresentsNarrative nonfiction, prescriptive nonfiction, memoir, sports, health, business, political books, pop culture, social justice, women's issues, underrepresented voices, commercial fiction, literary fiction, illustrated books, graphic novels, young adult, middle grade, children's books
Looking forLisa Leshne is most passionate about narrative nonfiction and memoir highlighting extraordinary stories from diverse voices, women, underdogs, and leaders. She mainly acquires in sports, business, political, health, prescriptive, and pop-culture genres, and is always seeking exceptional literary and commercial fiction. The agency is especially interested in narrative and prescriptive nonfiction with social justice, women's issues, and underrepresented voices; sports, health, business, political, and pop-culture topics; exceptional commercial and literary fiction; and select illustrated, graphic novel, young adult, middle grade, and children's books.
How to submitSubmit through The Leshne Agency's official QueryManager form for fastest response, or email submissions@leshneagency.com with a query letter. Do not do both. For email queries, put QUERY as the first word in the subject line followed by the title. For nonfiction, include a complete proposal with overview, table of contents and chapter outline, target audience, marketing or promotion plans, comparable titles, bio, and at least 2 fully written sample chapters. For fiction, include author information, title, genre, word count, hook or tag-line, brief synopsis, inspiration if relevant, comparable titles, and 10-20 sample pages.
View source ↗
Recently verified
Are you this agent?

Renée Jarvis

Triangle House Literary

Open
RepresentsNarrative nonfiction, speculative fiction, upmarket fiction, literary fiction, children's books, commercial fiction, family saga, fantasy, graphic novels, historical fiction, humor, LGBTQ+, literary middle grade, literary young adult, romance, science fiction, short stories, food, history, journalism, memoir, nature, pop culture, psychology, science, technology
Looking forRenée is seeking narrative nonfiction, adult speculative, upmarket, and literary fiction, and children's books. She is interested in work centering POC and LGBTQIA+ voices and is particularly drawn to Black writers across the African diaspora. Her current QueryManager genres span adult fiction, children's categories, and nonfiction including arts, culture, food, history, journalism, memoir, nature, pop culture, psychology, science, technology, and travel.
How to submitSubmit through Renée Jarvis's QueryManager route. The current form asks for a query letter with bio, synopsis, AI disclosure, and the first 30 pages for fiction or a full proposal for nonfiction.
View source ↗
Recently verified
Are you this agent?

Neeti Madan

Sterling Lord Literistic, Inc.

Open
RepresentsLiterary fiction, upmarket fiction, commercial fiction, nonfiction, narrative nonfiction, memoir, food, lifestyle, pop culture, history, business, big ideas, self-help, wellness, parenting, children's books, picture books, middle grade, young adult
Looking forNeeti Madan is a partner at Sterling Lord Literistic. Her list includes literary, upmarket, and commercial fiction, nonfiction, children's books, and select lifestyle, food, pop culture, history, business, big idea, self-help, wellness, and parenting projects. She is interested in voice-driven fiction, narrative nonfiction, memoir, books with a strong platform or expertise, and work for young readers from picture books through YA.
How to submitSubmit through Sterling Lord Literistic's official submissions page and select Neeti Madan if the form offers an agent choice. SLL uses its online submissions portal rather than email queries. Include the requested query materials and follow the instructions in the portal.
View source ↗
Recently verified
Are you this agent?

Jim McCarthy

Dystel, Goderich & Bourret LLC

Closed
RepresentsLiterary fiction, commercial fiction, fantasy, mystery, romance, narrative non-fiction, memoir, history, pop culture, children's non-fiction
Looking forJim is particularly interested in literary fiction, underrepresented voices, fantasy, mysteries, romance, anything unusual or unexpected, and any book that makes him cry or laugh out loud. He wants to see more children's nonfiction.
How to submitSubmit to Jim McCarthy only via Query Manager at https:// queryManager.com or JimMcCarthy. Include query letter in body with first 25 pages of manuscript for fiction or proposal with sample chapter for nonfiction.
View source ↗
Recently verified
Are you this agent?

Stacey Glick

Dystel, Goderich & Bourret LLC

Open
RepresentsAdult nonfiction, practical nonfiction, narrative nonfiction, cooking, food writing, psychology, self-help, mental health, wellness, lifestyle, women's issues, parenting, current events, pop culture, science, biography, memoir, young adult, middle grade, children's nonfiction, picture books
Looking forStacey Glick is Vice President at Dystel, Goderich & Bourret. Her official profile says she wants to see more expert-driven prescriptive and narrative nonfiction. She is interested in adult practical and narrative nonfiction across categories including cooking and food, psychology, self-help, mental health and wellness, lifestyle, women's issues, parenting, current events, pop culture, science, biography, and memoir. On the children's side she represents select YA, middle grade, nonfiction, and picture books. She also notes an interest in cookbooks, culinary subjects, psychology, pop culture, current events, business, narrative nonfiction, and fresh approaches to existing subjects.
How to submitEmail Stacey Glick at sglick@dystel.com. Dystel, Goderich and Bourret asks writers to query only one agency agent at a time, include the full query in the body of the email, and include the first 25 pages for fiction or a nonfiction proposal with sample chapter below the query. Picture book submissions should include the full text plus a dummy or sample art if available. Graphic novel submissions should include the first 25 pages of script and, for author-illustrators, 10 illustrated pages or other relevant materials.
View source ↗
Recently verified
Are you this agent?
Compare with similar agents

Browse by genre

literary fictioncommercial fictionnarrative non-fictionmemoirchildren'syoung adult (ya)illustrated / picture booksgraphic novels

This profile was last verified on 26 May 2026. PairPi tracks UK literary agents' submission guidelines against their own websites. If you spot something wrong, please email hello@pairpi.com.