Katie Ferriello
OpenMansion Street Literary Management·US
Agent profile summary
- Represents
- new adult/adult: romanceromantasyand fantasyyoung adultmiddle gradepicture books
- How to submit
- QueryTracker
Recently verified·Last verified: 13 May 2026
Katie Ferriello is a literary agent at Mansion Street Literary Management based in US. Their list focuses on genres including new adult/adult: romance, romantasy, and and fantasy. Currently open to submissions, with responses usually within anything from a few days to six weeks. Submissions via QueryTracker. For current guidelines, check the agent's own submission page linked below.
Age Categories
Adult, New Adult, Young Adult, Middle Grade, Picture Books
Response Time
Usually responds within anything from a few days to six weeks
Notes
Query only one agent at a time. If one agent passes, you may then query another. For updated manuscript wishlist, visit: https://manuscriptwishlist.com/mswl-post/katie-ferriello/
Other agents at Mansion Street Literary Management
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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Mansion Street Literary Management
Open
RepresentsChildren's picture books, pop culture, cookbooks, gift books, general nonfiction, brand extensions, lifestyle/design books
Looking forChildren's Picture Books, Pop Culture, Cookbooks, Gift Books, General Nonfiction, Brand Extensions, Lifestyle/Design Books. NOT interested in Memoirs or Medical/Reference. Typically Sports and Self-Help are not a good fit. Also does not represent Travel Books.
How to submitUse Query Manager submission form
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Agents with overlapping taste
The Jennifer De Chiara Literary Agency
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RepresentsMiddle grade, young adult, adventure, fantasy, mystery, thriller, suspense, paranormal, urban fantasy, horror, speculative fiction, science fiction, contemporary fiction, romance, pop culture nonfiction, picture books, adult horror, adult mystery, adult thriller, women's fiction, new adult
Looking forMarlo seeks emotionally involving stories with compelling characters and tight plots. She is interested in middle grade and young adult across many genres, picture books primarily from author-illustrators, and adult horror, mystery, thriller, suspense, women's fiction, and romance.
How to submitSubmit a query and the first 20 pages through Marlo Berliner's QueryManager. Picture book queries should include a portfolio link and the full text of the manuscript. Email, social, and postal queries are not considered.
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The Seymour Agency
Closed
RepresentsPicture books, middle grade, young adult, new adult, adult fiction, illustrators, contemporary fiction, magical realism, fantasy, horror, romance, romantic comedy, romantasy, women's fiction, memoir, narrative nonfiction, spirituality, self-help, health and fitness, parenting, business, celebrity, lifestyle, pets, psychology, relationships and dating, true crime, bipoc voices, LGBTQ+ voices
Looking forLynnette Novak is an agent at The Seymour Agency. When she reopens, she is especially excited about BIPOC, diverse, and LGBTQ+ projects; illustrators for board books, picture books, illustrated MG, and illustrated covers; fiction and nonfiction picture books; MG contemporary, magical realism, contemporary or grounded fantasy, and horror; YA romcom, romantasy, fantasy, magical realism, and horror; NA contemporary romance, romcom, and romantasy; adult horror, dark romance, contemporary romance, romcom, romantasy, and women's fiction; and adult nonfiction including memoir, narrative, spirituality/New Age, self-help, health/fitness, parenting/family, motivational/inspirational, business, celebrity, lifestyle, pets, psychology, relationships/dating, and true crime by experts with platforms.
How to submitLynnette Novak is currently closed to all queries according to the official Seymour Agency about page. The page says to watch her MSWL page for updates when she reopens, but no current open official query route is listed.
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Martin-Newens Literary Management
Open
RepresentsPicture books, middle grade, young adult, new adult, fantasy, thriller, mystery, adventure, contemporary romance, horror, paranormal romance
Looking forLindsey is building a list in picture books, middle grade, young adult and new adult. She is open to fantasy, thriller, mystery, adventure, contemporary romance, horror and paranormal romance, with fresh concepts, strong voice, high stakes and emotional drive.
How to submitSubmit through Lindsey Aduskevich's QueryTracker form. Query only one Martin-Newens representative at a time.
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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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The Tobias Literary Agency
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RepresentsFantasy, mystery, horror, speculative fiction, romance, picture books, middle grade, young adult, graphic novels
Looking forShe is primarily looking for bold, emotional narratives with layered characters, lyrical and atmospheric writing, voicey genre-blending tales, big stakes, speculative worlds filled with haunting quietly wondrous magic, sharply funny rom-coms and coming of age narratives, witty and heartfelt picture books, and fearless storytellers tackling big ideas. She loves working with and supporting marginalized authors and their stories.
How to submitSubmit materials via Query Manager.
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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.
Recently verified
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This profile was last verified on 13 May 2026. PairPi tracks UK literary agents' submission guidelines against their own websites. If you spot something wrong, please email hello@pairpi.com.