Kate Prosswimmer

Kate Prosswimmer – Editor

Children's book editor of multiple NYT bestsellers (PB, MG, and YA) with 10+ years of experience - let me help you optimize your story!

Overview

I was lucky enough to join the publishing world ten years ago when I began interning for The Bent Agency, where I learned how to make a living doing what I love: helping create amazing books!

After completing my Master’s degree in English Lit and working part-time at TBA, I started at Sourcebooks in Children’s Editorial where I discovered my passion for editing. There’s nothing quite like working with the world’s most creative people to help take their inspired creations to the next level! During my almost six years at Sourcebooks, I had the chance to work on incredible projects like Zoraida Cordova’s critically acclaimed BROOKLYN BRUJAS series; Jess Keating’s award-winning picture book, SHARK LADY; and Jen Calonita’s enchanting and hilarious FAIRY TALE REFORM SCHOOL series. I am now a Senior Editor at Simon & Schuster, where I've acquired an exciting new list of bestselling and award-winning titles, including Amanda Foody's WILDERLORE series, SPELL BOUND and SO THIS IS EVER AFTER by F.T. Lukens, NOODLE AND THE NO BONES DAY by Jonathan Graziano and Dan Tavis, and A DOOR IN THE DARK by Scott Reintgen.

I’ve edited a wide variety of projects from picture books through YA. I love the whole spectrum of contemporary to speculative, though I’m not the best fit for graphic novels or novels in verse. I also routinely attend conferences with SCBWI and other organizations where I teach workshops and provide critiques. In short, I love books and reading!!
Services
Fiction
Middle Grade Middle Grade Fantasy Young Adult
Languages
English (US)
Certifications
  • Master’s Degree in English Literature

Work experience

Simon & Schuster

Apr, 2019 — Present

Acquires, edits, positions, and oversees the publication process for a list of picture books, middle grade, and young adult projects for each season.

Sourcebooks

Sep, 2013 — Apr, 2019 (over 5 years)

Acquires, edits, positions, and oversees the publication process for a list of picture books, middle grade, and young adult projects for each season.

The Bent Agency

Jun, 2013 — Aug, 2013 (2 months)

Provided support cataloging contracts, reviewing manuscripts, and evaluating query letters.

Portfolio

And Don't Look Back

Barrow, Rebecca

Monster Camp

Henning, Sarah

Spell Bound

Lukens, F.T.

Those Summer Nights

Silverman, Laura

In Deeper Waters

Lukens, F.T.

Bad Things Happen Here

Barrow, Rebecca

An Amazon Best Book of the Month―Named a Best Children's Book of 2017 by Parents magazine―One of New York Times's Twelve Books for Feminist Boys and Girls! Discover the story of a woman who dared to dive, defy, and inspire. This is Shark Lady.Learning about sh... read more
Recommended for You

Silverman, Laura

Lies Like Poison

Pitcher, Chelsea

Their fantasy is her reality in this bright and uplifting contemporary coming-of-age novel by the acclaimed author of Breaking Sky and You Were Here. Iris Thorne wants to blaze her own path. That's easier said than done when you're the granddaughter of M. E. T... read more
The only way to get her family back is to travel to a land in between, as dark as Limbo and as strange as Wonderland...Alex is a bruja, the most powerful witch in a generation...and she hates magic. At her Deathday celebration, Alex performs a spell to rid her... read more
"Funny, charming, and rebellious." -James Riley, New York Times bestselling author of The Story Thieves series and the Revenge of Magic seriesIn Enchantasia, becoming a legendary prince or princess doesn't happen overnight. Enter Royal Academy, the training gr... read more
After Zero

Christina Collins

"Powerful and poetic." ―John David Anderson, author of Posted and Ms. Bixby's Last DayElise carries a notebook full of tallies, each page marking a day spent at her new public school, each stroke of her pencil marking a word spoken. A word that can't be taken ... read more
I Love Kisses

Sheryl McFarlane

I love kisses. I'll bet that you do too!Wake up sleepyhead kissesRaspberry jam and bread kisses... There are lots of kinds of kisses in the world, and they all say something different. Award-winning author Sheryl McFarlane's new book celebrates the best part a... read more

Kate has 20 reviews

Professionalism

Quality

Value

Responsiveness

Ty T.

Ty T.

Feb, 2024

Kate's feedback has helped us (my daughter and I started writing this book together when she was 10) greatly improve our manuscript. We're not entirely finished with applying the edits, but we already feel like Kate helped us to understand the weak parts of the novel, cheered us on on parts she found entertaining or well done, and challenged us to think differently about some aspects as well. O...
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Clyde W.

Clyde W.

Dec, 2023

As a first-time author, I was very nervous about having my work looked at by a professional editor. Kate's report was more than I expected. It was both supportive and constructive. It was full of detailed suggestions and explanations, which were easy for someone of my level to understand. I highly recommend Kate.
Mark C.

Mark C.

Oct, 2023

Kate always does fantastic work for me. Her editorial eye is sharp and her ability to help me craft the story in deeper ways is always a benefit; that's why I keep going back to her . . . you should too!
Nathan S.

Nathan S.

Jul, 2023

Kate's insight and attention to detail with my manuscript really helped to illuminate the direction my next few drafts need to take. She was prompt, communicative, and extremely professional. I wouldn't hesitate to work with her again.
Mark H.

Mark H.

Jun, 2023

I hired Kate for a developmental edit on an MG novel that I knew needed help but I couldn't see how. Kate gave a very clear editorial assessment - as well as line notes on the manuscript - that provided what beta readers couldn't - a roadmap to follow for this next rewrite. Her edits focused on the intersection of where character arc meets plot - and how the two interact - which is what my curr...
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