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Belcastro Agency·US

Agent profile summary

Represents
historical fictionhorrorcontemporary fictionfantasysuspensethriller
+1 moregraphic novels
Looking for
Query Letter
How to submit
QueryManager
Recently verified·Last verified: 15 May 2026

Kaitlyn Katsoupis is a literary agent at Belcastro Agency based in US. Their list focuses on genres including historical fiction, horror, and contemporary fiction. Currently closed to submissions. Submissions via QueryManager. For current guidelines, check the agent's own submission page linked below.

Age Categories

Adult, Young Adult, Middle Grade, Children's

Notes

Currently closed to queries.

Other agents at Belcastro Agency

Belcastro Agency

Open
RepresentsPicture books, middle grade, young adult, graphic novels, contemporary fiction, christian fiction, family saga, historical fiction, literary fiction, romance, women's fiction, humor, commercial fiction, multicultural fiction
Looking forSyrone is focused on strong diverse and multicultural voices, picture books with humor and heart, middle grade, YA, graphic novels, coming-of-age, friendships, family saga, contemporary fiction, Christian fiction, historical fiction, literary fiction, contemporary romance, women's fiction, humor, commercial fiction, and stories with faith, redemption, forgiveness, and strong conversation hooks.
How to submitSubmit through Syrone's official QueryManager route. Belcastro asks writers to read each agent's wishlist, submit to one agent at a time, and use the Submit a Story button to reach the query form.
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Belcastro Agency

Open
RepresentsFantasy, science fiction, horror, romantasy, young adult, middle grade, graphic novels, romance
Looking forMorgan is focused on marginalized voices and is open to adult and YA fantasy, science fiction, horror, romantasy, YA paranormal or mystery, middle grade fantasy, science fiction and horror, and graphic novels, especially fantasy, science fiction, horror, romance, and manga-inspired work.
How to submitSubmit through Morgan's official QueryManager route with a query including metadata, pitch or blurb, short bio, synopsis, content warnings if applicable, and first chapter or proposal. Sample artwork may be uploaded where relevant.
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Belcastro Agency

Open
RepresentsYoung adult, horror, science fiction, fantasy, romance, women's fiction, commercial fiction, book club fiction, speculative fiction, thriller, nonfiction
Looking forAmy wants fiction with messy characters, unreliable narrators, diverse casts, social commentary, and big twists. She is interested in YA horror, grounded science fiction/fantasy and gothic; adult and new-adult romance, women's fiction, horror/speculative fiction, thrillers, and selected platform-driven nonfiction.
How to submitSubmit through Amy's official QueryManager route with a query letter, synopsis, one-sentence pitch, and first 10 pages pasted into the form. Review her current exclusions before querying.
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Belcastro Agency

Open
RepresentsNonfiction, young adult, fantasy, science fiction, action adventure, contemporary, magical realism, mystery, thriller, horror
Looking forSharon is seeking nonfiction and young adult, including YA fantasy, science fiction, action/adventure, contemporary, magical realism, mystery/thriller, and horror.
How to submitSubmit through Sharon's official QueryManager route. Belcastro asks writers to read each agent's wishlist, submit to one agent at a time, and use the Submit a Story button to reach the query form.
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Belcastro Agency

Closed
RepresentsPoetry, picture books, graphic novels, contemporary fiction, fantasy, science fiction, romance, young adult
Looking forTasneem is looking across categories for work from marginalized authors, especially under the BIPOC umbrella. Interests include genre-inflected poetry, picture books, graphic novels, contemporary MG/YA/adult, fantasy, YA/adult science fiction, and YA/adult romance.
How to submitTasneem is currently closed to queries. The official Belcastro page links her QueryManager route, the linked form says she is closed until further notice, with a separate BIPOC-exclusive form noted there.
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Belcastro Agency

Open
RepresentsMystery, thriller, suspense, historical fiction, young adult
Looking forElla Marie is looking for adult mysteries, thrillers, suspense, historical fiction, and YA thriller, suspense, mystery, detective fiction, and historical fiction. She is looking for diverse authors and fast-paced stories.
How to submitSubmit through Ella Marie's official QueryManager route. Belcastro asks writers to read each agent's wishlist, submit to one agent at a time, and use the Submit a Story button to reach the query form.
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Agents with overlapping taste

Triada US Literary Agency

Open
RepresentsChick lit, commercial, contemporary, cozy fantasy, cozy romantasy, crime, detective, police, family saga, fantasy, fantasy: magical realism, fantasy: urban, graphic novel, historical, horror, LGBTQ+, literary, middle grade, military, espionage, multicultural, mystery, new adult, offbeat, quirky, romance, romantasy, suspense, thriller, upmarket, women's fiction, young adult
Looking forQuery Letter, Synopsis, One Paragraph Pitch, Comparable Books, First 10 Pages
How to submitSubmit through Query Manager. Unsolicited queries sent to his email address will be deleted unread.
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Andrea Brown Literary Agency

Open
RepresentsLiterary fiction, commercial fiction, thriller, horror, science fiction, fantasy, speculative fiction, historical fiction, picture books, middle grade, young adult, romance, mystery
Looking forLaura would love to find fantasy, spec fiction, alternate history, and horror with fresh, original, unexpected reimaginings. She seeks retellings that reinvent underlying traditions, gothic suspense or thrillers, romantasy that is more romantic fantasy than fantasy romance, high concept rom-coms, and sexy historical romance. She also wants thrillers and mysteries with dynamic, unexpected characters and rich psychological insights.
How to submitClick on the QueryManager link in the agent's bio, follow the prompts, and complete all required fields including a short query letter with a description of your work, previous publishing credentials, a short author bio, contact information, and for novels: first 10 pages of text.
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Andrea Brown Literary Agency

Open
RepresentsThriller, horror, historical fiction, science fiction, fantasy, adult fiction, board books, picture books, early readers, chapter books, middle grade, young adult fiction, young adult non-fiction
Looking forLara is currently open to adult fiction queries only. She seeks thrillers, horror with purpose, historical fiction that feels immediate and hooky, and grounded and unexpected science fiction and fantasy. She is always excited to see unreliable narrators, twisty mysteries, eerie settings, psychological horror, and character-driven stories with sparks of magic.
How to submitSubmit through QueryManager with a short query letter, author bio, contact information, and first 10 pages of text for novels. Complete the required fields in the submission form.
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Transatlantic Agency

Open
RepresentsLiterary fiction, upmarket fiction, commercial fiction, contemporary fiction, historical fiction, fantasy, science fiction, speculative fiction, horror, middle grade, young adult, graphic novels, graphic nonfiction, memoir, narrative nonfiction, history, investigative journalism, nature, science, food, travel, pop culture, cultural criticism
Looking forJane Chun is interested in stories centering marginalized communities and prose that is cinematic and atmospheric with good rhythm. In fiction and nonfiction she is drawn to compelling, fresh voices with intimacy, rich inner worlds, and emotional depth. She is interested in literary, upmarket, and commercial fiction across adult, middle grade, and young adult; select nonfiction; and graphic novels or graphic nonfiction. In fiction she is open to contemporary, historical, fantasy, science fiction, speculative, and horror. In nonfiction she is looking for memoir, narrative nonfiction, history, investigative journalism, books about nature, climate and science, and books about food, travel, pop culture, and cultural criticism.
How to submitSubmit to Jane Chun through her official QueryManager form. If QueryManager is not working, email queryjane@transatlanticagency.com, but do not submit through both methods. For email queries, include the book title, category or genre, word count or estimated page count for graphic work, and author bio. Fiction should include a brief introduction, synopsis, and first ten pages in the body of the email. Nonfiction should include a brief introduction, full outline, and first ten pages of the manuscript in the body of the email. Graphic novels or nonfiction should include a brief introduction, synopsis or outline, and at least five illustrated pages with text, or ten script pages and sample art if five pages are not available.
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Mansion Street Literary Management

Open
RepresentsYoung adult fiction, middle grade fiction, graphic novels, women's fiction, romance, historical fiction, science fiction, fantasy, horror, psychological thriller, narrative nonfiction, biography, culture, social justice, history
Looking forMichelle Witte founded Mansion Street Literary Management and represents MG and YA fiction, graphic novels, adult fiction, and narrative nonfiction. In YA she is looking for rom-com, historical, science fiction and fantasy, horror, psychological thrillers, and mashups of those categories; in MG, fun voices in adventure, contemporary, mystery, humor, horror, speculative, science fiction and fantasy, plus select graphic novels. In adult fiction she seeks women's fiction, romance, and speculative work. For nonfiction she is interested in biographies, culture, social justice, and history with a fresh lens and a personal element.
How to submitSubmit to Michelle Witte through the official QueryManager link on the Mansion Street submissions page. Her form asks for project details, query letter, synopsis, comparable books, AI disclosure, and the first 5 pages or a full proposal for nonfiction. Mansion Street says if you do not hear back within 8 weeks, consider it a pass.
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Jill Grinberg Literary Management

Open
RepresentsAdult fiction, upmarket fiction, historical fiction, speculative thriller, fantasy, romance, adult nonfiction, narrative history, food writing, beverage writing, self-help, popular science, young adult, middle grade, picture books, graphic novels
Looking forSam Farkas is Global Rights Director and Literary Agent at Jill Grinberg Literary Management and is open to queries. Above all, she is drawn to exemplary writing. In adult fiction she looks for upmarket fiction, especially historical; fast-paced high-concept speculative thrillers; lyrical and immersive fantasy with book club appeal; and romance that simmers. In adult nonfiction she seeks immersive narrative history, food and beverage writing, quirky self-help for millennials and Gen Z, and beautifully written pop science. She is also open to young adult and middle grade of all genres, especially voice-driven contemporary with a speculative twist, historical with modern sensibilities, fresh fantasy, tightly plotted thrillers, mysteries, horror, the very strange, and the very funny. Across categories she wants diverse and underrepresented voices.
How to submitEmail info@jillgrinbergliterary.com with the subject format QUERY: Title of Project by Your Name or Book Age Category and Genre or ATTN: Sam Farkas. Paste the query letter in the email body and address it directly to Sam. Attach materials as a docx file. Fiction submissions should include a query letter and the first 50 pages. Nonfiction submissions should include a query letter and proposal. Picture book submissions should include the full text, and graphic novel submissions should include a full pitch package.
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This profile was last verified on 15 May 2026. PairPi tracks UK literary agents' submission guidelines against their own websites. If you spot something wrong, please email hello@pairpi.com.