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Jennifer Mattson

Closed
Andrea Brown Literary Agency·US

Agent profile summary

Represents
middle gradeyoung adultpicture booksillustrationauthor-illustratorschildren's
Looking for
Query Letter, Sample Pages
How to submit
Email
View source·Agent page
Recently verified·Last verified: 15 May 2026
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Jennifer Mattson is a literary agent at Andrea Brown Literary Agency based in US. Their list focuses on genres including middle grade, young adult, and picture books. Currently closed to submissions. Submissions via Email. For current guidelines, check the agent's own submission page linked below.

Age Categories

Picture Books, Children's, Middle Grade, Young Adult

Other agents at Andrea Brown Literary Agency

Sally M. Kim

Andrea Brown Literary Agency

Open
RepresentsChildren's fiction, children's non-fiction, picture books, chapter books, middle grade, graphic novels
Looking forShe is drawn to stories with a distinct voice, unexpected wit, aggressive pacing, punchy and/or emotionally resonant endings. She is especially eager to see authentic explorations of underrepresented cultures, relationships, and identities.
How to submitSubmit via QueryManager only during the first 15 days of each month. Include query letter, author bio, and sample pages as specified in agency guidelines.
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Kathleen Rushall

Andrea Brown Literary Agency

Closed
RepresentsPicture books, chapter books, middle grade, young adult, adult fiction, contemporary, fantasy, romance, suspense, non-fiction
Looking forShe loves both contemporary and fantasy as well as the spooky and unexpected. She loves multi-generational stories, matrilineal magic, and is always happy to see high-concept contemporary romance. She also enjoys darker suspenseful reads and loves atmospheric settings that feel like a character. For picture books, she works on both fiction and nonfiction with interest in environmental and STEM themes, animals, emotional intelligence, and books for youngest readers including vehicle books.
How to submitSubmit through QueryManager with query letter, author bio, publishing credentials, contact information, and sample pages. For novels: first 10 pages. For picture books text only: full manuscript. Response even if passing.
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Analía Cabello

Andrea Brown Literary Agency

Open
RepresentsPicture books, middle grade fiction, young adult fiction
Looking forShe seeks characters who feel in-between, stories of self-discovery and character growth, explorations of sibling relationships and intergenerational families, and stories from creators whose voices have been traditionally underrepresented. She values cultural specificity and stories borne from personal experience.
How to submitSubmit through QueryManager with query letter, author bio, contact information, and first 10 pages for novels or full text for picture books. Include synopsis and confirm work is not AI-generated.
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Saritza Hernández

Andrea Brown Literary Agency

Open
RepresentsRomance, science fiction, fantasy, gothic tales, horror, cozy mysteries, upmarket commercial fiction, narrative non-fiction, young adult, middle grade
Looking forSaritza seeks commercial fiction by diverse authors, particularly romance with complex characters, propulsive science fiction, character-driven fantasy, atmospheric horror, cozy mysteries, upmarket commercial fiction, narrative nonfiction about culture and food, and all Young Adult/Middle Grade genres especially science fiction and romance.
How to submitSubmit via QueryManager link with query letter, author bio, contact information, and first 10 pages for novels. Include one-sentence pitch. Follow submission guidelines on agency website.
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Laura Rennert

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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Caryn Wiseman

Andrea Brown Literary Agency

Closed
RepresentsPicture books, middle grade, non-fiction
Looking forCaryn looks for authentic, kid-appealing stories and art that disrupt the prevailing narrative in some way. She seeks characters that stick with her long after she has closed the book and loves stories that bring a good, cathartic cry, a huge belly laugh, some outrage, some new knowledge, and above all, hope. Social justice has been at the heart of her list since she started agenting.
How to submitSelect one agent to query via QueryManager link on agent bio page. Submit query letter with work description, publishing credentials, author bio, contact information, and required sample materials based on format.
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Agents with overlapping taste

Anjanette Barr

Dunham Literary

Closed
RepresentsAdult fiction, adult non-fiction, children's books, historical fiction, literary fiction, upmarket fiction, romance, fantasy, science fiction, biography, memoir, middle grade, young adult, picture books
Looking forIn Adult Fiction she seeks captivating settings and relatable characters that highlight virtues like empathy and self-sacrifice in historical, literary/upmarket, romance, or fantasy/science fiction genres. In Adult Non-fiction she wants well-researched titles that make complex topics accessible, biography and memoir that connect diverse readers, and books about poverty and justice. For children's literature, she loves books that can be read aloud and shared with families, especially middle grade, and seeks books with hopeful, informative, or lyrical tones.
How to submitStarting January 2026, queries must be submitted through QueryManager only. Address your query to the specific agent you think would be the best fit. Only send one query to Dunham Literary as agents share queries with each other when appropriate.
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Rubin Pfeffer

Aevitas Creative Management

Check availability
RepresentsPicture books, middle grade, YA, illustrated children's books
Looking forChildren's books across all formats, including picture books, middle grade, and young adult, with a particular interest in diverse voices, nonfiction narratives, and illustrated works for young readers
How to submitSubmissions should be directed through the Aevitas Creative Management contact and submissions form. The agency handles queries for Children's, Middle Grade, and Young Adult categories.
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Michaela Whatnall

Dystel, Goderich & Bourret LLC

Open
RepresentsMiddle grade, young adult, upmarket adult fiction, grounded fantasy, adult romance, narrative non-fiction, graphic novels, picture books
Looking forMichaela is most strongly interested in finding middle grade and young adult projects of all genres, upmarket adult fiction, and grounded fantasy. They are also open to select adult romance, narrative nonfiction for both children and adults, graphic novels, and picture books. Specifically seeks sibling stories.
How to submitSubmit only via Query Manager. Include full query in body, first 25 pages for fiction or proposal with sample chapter for nonfiction. For picture books, include full text and dummy or sample art if available. Query only one agent at the agency at a time.
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Laura Rennert

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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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.
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Lara Perkins

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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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.