Stefani Ruper

Stefani Ruper – Editor

Nonfiction editor who left Harvard to help health, psychology & business leaders turn their big ideas into brilliant, life-changing books

Overview

Writing is tricky business. There are nearly infinite ways to say what you want to say—but only one of them is the best. How do you find just that right one?

That's where I come in. I help authors who want to speak clearly, reach readers, and make a difference find the ideal way to bring their ideas fully into clear, compelling view.

—What it’s like to work with me—

• Deep respect for the your voice and intent (I never make an edit that I believe would compromise an author's vision or personality)

• Rigorous, thoughtful feedback grounded in careful listening

• Clear, direct diagnosis of what’s working and what isn’t

• Practical guidance you can actually use

—My experience—

I have...

• edited or ghostwritten multiple nonfiction books, including projects published by major houses (Penguin, HarperCollins, Avery, Little)

• written and published two books of my own (Victory Belt, On the Way Books)

• helped several book proposals get six-figure bids at auction (in fact, every proposal I've worked on has gotten multiple six-figure bids)

• trained in communicating complex ideas clearly at the BBC, Oxford, and Harvard.

—My expertise—

I work in non-fiction broadly, specializing in psychology, health, and business.

My deepest experience is in business (leadership, performance, adaptability), psychology (trauma therapy, mental disorder, disability, resilience, stress management), health (women's health, fertility, type 2 diabetes, blood sugar management, weight management, skin health, autoimmune disease, general nutrition), and philosophy (back in the day, I got a PhD in philosophy at Oxford). But I am very widely read and studied, and I'd be glad to talk with you about your topic to assess fit.

—Working style & testimonial—

I work with authors in a way that’s careful, respectful, and attuned to what they’re trying to say. I dive into their work and stay thoughtfully with it through our working window, constantly mulling over how I can help them clarify, prune, present, persuade, resonate, and frame better.

It's worth re-stating that I never make an edit that I believe compromises an author's personality or goals. Ever.

Clients often come to me when they need a collaborator who can see their thinking clearly and strengthen the manuscript without flattening their voice.

A book recently published by Amplify states in the Acknowledgments:

“Stefani, thank you for all of your guidance, ideas, conversation, and brilliant writing during this project. This would not have come to fruition without you.”

Another published by Penguin says:

“Stefani, thank you for helping me bring this manuscript to life. Your talent and listening skills are unmatched.”

I'd love to explore if I can be an equally helpful editor for you.

Services
Non-Fiction
Business & Management Health & Wellbeing Psychology Self-Help & Self-Improvement
Languages
English (UK) English (US)

Work experience

Self-employed

Jan, 2022 — Present
Serve as a developmental editor and ghostwriter on nonfiction book projects across: • women's health • metabolic health & diabetes • nutrition • mental health • addiction • trauma recovery • social health & relationships • narrative non-fiction • business & leadership These include titles published by major houses such as HarperCollins, Penguin Random House & Little, Brown and Company.

Harvard Business School

Oct, 2021 — Apr, 2022 (6 months)
• Conducted qualitative and quantitative research on business leadership, culture, and trust; • wrote 20+ reports on trends in global business adaptability; • contributed to case studies on business strategy for use in executive and educational contexts.

Health to Empower (a women's health education platform)

Sep, 2012 — Jan, 2020 (over 7 years)
Wrote or developmentally edited all content, growing the organization from zero to 1M+ annual readers. This included: • 400+ articles on fertility, osteoporosis, postpartum health, menopause, and more; • two books (Victory Belt, 2014; HarperCollins, 2018).

Portfolio

Developmental Editing Editorial Assessment Query Letter Review
Developmental Editing Editorial Assessment
Developmental Editing Editorial Assessment Query Letter Review
Developmental Editing Copy Editing Query Letter Review
Developmental Editing Editorial Assessment
Developmental Editing

Stefani has 10 reviews

Professionalism

Quality

Value

Responsiveness

Taryn S.

Taryn S.

Jul, 2026

Stefani was absolutely wonderful to work with. She did a phenomenal job shaping the manuscript and bringing it to its fullest potential.
Joe A.

Joe A.

Jul, 2026

Stefani is a fantastic editor. I've come back to her across multiple rounds of an unconventional, hard-to-categorize project, and every time she goes above and beyond in the care and attention she brings. Her comments are detailed and genuinely useful. She reads like a reader, flagging the exact ...
Read more
Jeremy D.

Jeremy D.

Jul, 2026

I'm the definition of a newbie to the authoring game. I had just finished the "release candidate" draft of my mental health manuscript when I found Reedsy, with almost no idea of what the publishing process actually involved (and honestly, I still don't in a lot of ways). After reading up a bit, ...
Read more
Doug V.

Doug V.

Jun, 2026

Stefani was exactly what I needed at an important stage of my book proposal. She responded promptly, worked efficiently, and came up to speed on complex material quickly and at a high level. Her editorial guidance was substantive not cosmetic. And the proposal was improved in ways that made a di...
Read more
Ben T.

Ben T.

May, 2026

Working with Stefani was an excellent experience. She gave my manuscript the kind of careful, thoughtful developmental edit every author hopes for but does not always find. While I felt my book had a strong foundation, Stefani helped me see what was truly distinctive about it. She identified the...
Read more
Stefani R.
Ben, thank you so much for such a thorough review! It was a real pleasure to work with you and your strong ideas and book.

Sign up to read more reviews

Create a free Reedsy account to connect with Stefani and thousands of other publishing professionals on Reedsy.

Professionals similar to Stefani

Get a range of offers by requesting quotes from multiple professionals.

Claire M.

Meticulous, highly experienced editor, specialising in non-fiction: memoir, biography, business & leadership, self-development, health ...

Melbourne VIC, Australia

100% reply rate

View profile

James K.

Science writer, editor and copy-editor, formerly at the Guardian newspaper and New Scientist magazine. Author of two books.

Shrewsbury, UK

100% reply rate

View profile

Claire W.

I've served as a developmental editor on over 30 non-fiction titles, specializing in psychology, personal development and media subjects.

Los Angeles, CA, USA

100% reply rate

View profile