Merrilee Heifetz is a veteran Writers House agent with decades of deal-making history, known for championing science fiction, fantasy, and children's literature with strong commercial and literary reach.
In brief
Merrilee Heifetz is one of the most established agents at Writers House, a top-tier New York literary agency with significant publisher relationships across the Big Five and beyond.
Their career spans adult genre fiction (particularly SFF), middle grade, and young adult — a breadth that signals comfort with both commercial and crossover projects.
Writers querying Heifetz should expect a seasoned eye: this is an agent who has navigated decades of industry shifts and tends to take on projects they can genuinely champion long-term.
With a long track record at a prestigious agency, Heifetz brings institutional relationships that smaller or newer agents simply cannot match — a real advantage for authors seeking wide submission reach.
Query status was observed as open in April 2026, but writers should always verify the live submission form before sending, as status can change without notice.
Lately
Writers House maintains Heifetz as an actively querying agent with a broad speculative fiction and children's literature focus, reflecting decades of consistent deal-making in those areas.
What Merrilee is looking for
Heifetz has a long record in speculative fiction for adults and continues to seek ambitious, well-crafted SFF — both epic fantasy and science fiction with big ideas and strong character work. Projects that blend literary sensibility with genre momentum are a strong fit.
Middle grade has been a consistent thread throughout Heifetz's career. They are drawn to MG with genuine emotional stakes, distinct voice, and the kind of adventure or wonder that stays with young readers long after the last page.
YA with a strong narrative hook and authentic teen voice is welcome. Heifetz gravitates toward YA that has crossover potential or a genuinely fresh angle on familiar emotional terrain.
Heifetz takes on adult literary and commercial fiction selectively, favoring projects with a compelling premise and prose that earns attention. This is not a primary focus, so the bar is high.
Not the right fit
On Merrilee's list
Taste fingerprint
How to query Merrilee
Lead your query letter with the genre, word count, and a one- or two-sentence hook that captures what makes your book distinctive — Heifetz has seen thousands of queries and needs to be grabbed immediately.
Given Heifetz's history with landmark SFF authors, situate your work clearly within a tradition or lineage if relevant, but avoid vague genre labels; specificity about tone and stakes is more persuasive than 'a fantasy novel.'
For middle grade and YA, foreground the protagonist's voice and the central emotional conflict in your query — Heifetz's track record suggests a preference for character-driven narrative even within high-concept premises.
Do not query multiple agents at Writers House simultaneously for the same project; follow the agency's submission guidelines precisely.
If your work is speculative fiction with literary ambitions, name those ambitions directly — Heifetz's roster suggests genuine appreciation for SFF that operates on an ideas level, not just plot.
Verify the current query status and any submission window on the Writers House website before sending — status observed open in April 2026 but should be reconfirmed.