Deborah Sosin

Deborah Sosin – Editor

35+ years' experience in nonfiction, memoir, self-help, kid lit. Known for speed, accuracy, versatility, and compassion. MSW & MFA.

Overview

As a self-employed freelancer for several decades, I specialize in short- and long-form creative nonfiction, self-help and psychology titles, memoir, mindfulness and spirituality titles, and picture books. Because of my unusual combination of clinical and editorial expertise, I have developed a stellar reputation as a consultant and editor for self-help and nonfiction authors.

I’ve helped novice and veteran writers improve their work and get published through careful attention to macro issues such as structure, flow, audience, voice, and purpose; as well as micro issues such as grammar, punctuation, and redundancy. I view my role as a collaborator, coach, and cheerleader.

FALL 2025 UPDATE: Available for copyediting and proofreading, some editorial assessments. Currently unavailable for developmental editing.

As an award-winning picture-book author, I also consult with prospective or active children’s-lit writers who want help with project concepts, manuscript editing, and/or industry information. In addition, I offer personal coaching to help writers understand and work through writer’s block and other inner obstacles to creativity.

I am also an author, essayist, GrubStreet (Boston) instructor, and part-time psychotherapist. My clients have praised me over the years for being warm and approachable as well as exceptionally detail-oriented and perceptive about the big picture.

My own publishing credentials include a mindfulness-themed picture book, Charlotte and the Quiet Place (Parallax Press, 2015), illustrated by Sara Woolley, which won the Gold INDIEFAB Medal and the Silver IPPY Award, among several honors. A self-help workbook titled Sober Starting Today: Powerful Mindfulness and CBT Tools to Help You Break Free from Addiction was published by New Harbinger Publications in 2024. My essays have appeared in The New York Times, Salon, Cognoscenti, Boston Globe Magazine, Brevity Blog, Oldster Magazine, Short Reads, Journal News, The Writer's Chronicle, Writer's Digest, The Manifest-Station, Zone 3, two anthologies, and elsewhere. A scholarly paper on adolescent diary writing appeared in Adolescent Psychiatry.

I am highly selective about the projects I bid on because I give each project the personalized care and attention it deserves. As a result, I charge premium rates. I'm told that the investment is well worth it to receive premium services.

IMPORTANT: Before you submit a request, please review the categories very carefully on this page https://blog.reedsy.com/guide/editing/. We will save lots of time if you are clear about where you are in your book's development and what the differences in services are.

Services
Non-Fiction
Biographies & Memoirs Career Guides Children’s Non-Fiction Psychology Self-Help & Self-Improvement
Fiction
Picture Books
Languages
English (US)

Work experience

Self-employed

Jan, 1990 — Present
See overview above for the range of genres I specialize in. In the 1990s, I was a production editor in the School Reading Department at Houghton Mifflin; manager of the Copyediting and Proofreading Department at Publicom, Inc.; and freelance proofreader in the trade division of Houghton Mifflin.

Portfolio

Developmental Editing Copy Editing Proofreading
Developmental Editing Copy Editing Proofreading
Developmental Editing
Developmental Editing
Developmental Editing
Developmental Editing Copy Editing Proofreading
Rostam's Picture-Day Pusteen

Tahmaseb, Ryan Bani

Charlesbridge

Developmental Editing
Developmental Editing
Copy Editing
The Many Faces of Polyamory

Fosse, Magdalena J.

Copy Editing
Developmental Editing
The PTSD Workbook

Tijana Mandic, Ph.D.

Copy Editing
Developmental Editing
Copy Editing
Developmental Editing
Copy Editing
Copy Editing
Proofreading
Copy Editing
Copy Editing
Copy Editing
Hope's Crossing

Goodman, Joan Elizabeth

Copy Editing
Copy Editing
Dog and Rabbit

Saltzberg, Barney

Copy Editing
Copy Editing
Ten Beautiful Things

Griffin, Molly

Copy Editing
Proofreading
Copy Editing
Copy Editing
The Magical Mindful Day

Deborah Salazar Shapiro

Developmental Editing
Copy Editing
Developmental Editing
Copy Editing

Deborah has 39 reviews

Professionalism

Quality

Value

Responsiveness

Tricia S.

Tricia S.

Dec, 2023

Pinned
This is my second experience with Debbie, and I couldn't be happier. She is someone I can count on to tell me the truth and guide me to a better outcome. I would never hesitate to work with her time and time again. Thank you, Debbie, for everything!
Deborah S.
Thanks so much for this lovely review, Tricia! For me, it's all about collaboration--your attention to detail and passion about your project made the work fun and interesting. Best of luck and kee...
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Kirsten O.

Kirsten O.

Nov, 2025

Debbie was very thorough in her review and provided me much needed feedback for my book. She was honest and transparent, which helped me understand the feedback so that I could address it in my revisions. She met all the deadlines set, provided much needed guidance for me as a new author and even...
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Deborah S.
Thanks so much for this lovely review, Kirsten. I really enjoyed our collaboration, and I'm so glad that you found my editorial assessment helpful. I hope the world will have a chance to hear your ...
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Juliann W.

Juliann W.

Nov, 2025

Deborah is a true professional and collaborator. I got more than what I had hoped for, working alongside her.
Bryan B.

Bryan B.

Oct, 2025

Deborah is a highly detailed worker. She was helpful throughout the entire editing process.
Deborah S.
Thank you for taking the time to offer your kind review here, Bryan. It was a real pleasure working with you again and I will be eager to see your book in print. Good luck with all next steps!
Joe G.

Joe G.

Oct, 2025

Debbie is an absolute pro with the added bonus of being a great advisor/guide especially for first time authors. Working with her feels like you are truly working side by side with an expert who is one hundred percent on board. I don't give many reviews but this one is well worth giving. I highly...
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Deborah S.
Thanks so much, Joe! It means a lot. I so appreciated your flexibility and responsiveness and thoroughly enjoyed our collaboration. All best of luck with your first book!

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