Let’s work together

Editing Services for every stage of your book

Your Partner in Faith-Driven Writing

Editing isn’t just about correcting typos; it’s about helping your ideas connect with readers.

When we work together, you get more than just a red pen. You get a collaborative partner who cares about your message as much as you do. I take time to understand your vision and provide honest, yet kind feedback.

With clear communication and a prayerful approach, I help Christian authors take their work to the next level. If you’re looking for an editor who will honor your voice and strengthen your message,

You’ve come to the right place.

Mary K. Tiller Bookcase Tiller Editing Developmental Christian Nonfiction

Ways to work together

01.

Developmental Coaching

Perfect for the author who has a book concept. This step ensures the book you write is the book your reader needs.

That’s me!

02.

Developmental Editing

Perfect for the author who has completed their first draft. This big-picture edit checks structure, flow, & audience alignment.

That’s me!

03.

Line and Copy Editing

Perfect for the author who is done revising & ready to polish. This edit ensures clarity, consistency, and correctness.

That’s Me!

Coaching Services

Developmental coaching

$750

Get crystal-clear on your book’s message, your ideal reader, and the transformation you offer—all through one-on-one developmental coaching. Walk away with a concrete roadmap for your book and start writing with purpose.

The Deliverables:

  • Five 45-minute video coaching calls
  • Clarity on your message and ideal reader
  • Table of contents
  • Back cover copy
  • Feedback on first two chapters
Inquire About Coaching

“Since discovering Mary K. Tiller and her stellar editing abilities, I find myself writing with much more confidence, knowing I will have her eyes on my work.”

Mary K. is warm, encouraging, helpful, and detailed. She catches things I easily miss and polishes my writing until it shines! If you are looking for an editor…look no further. I promise, you have found one of the best!

– Teresa Whiting

  • Teresa Whiting

Developmental Editing Services

Manuscript Evaluation

$0.015-$0.018/word 

Get a clear, big-picture diagnosis of your manuscript without committing to a full edit. This evaluation identifies your manuscript’s strengths and key issues, giving you actionable guidance to revise with confidence—while keeping full creative control.

The Deliverables:

  • A comprehensive revision letter detailing:
  • Strengths and areas for improvement
  • Feedback on structure, flow, clarity, voice, and audience fit
  • Clear, actionable next steps for revision
  • In-manuscript comments illustrating key issues
  • 30-minute follow-up video conference call
Inquire about a manuscript evaluation

Developmental Editing

$0.04–$0.05/word

Bring your nonfiction manuscript to its full potential with hands-on developmental editing. I’ll work directly in your manuscript to restructure, clarify, and enhance your content, leaving you with a message that speaks directly to your reader.

The Deliverables:

  • Edited manuscript with reordering, restructuring, and clarifying of ideas
  • Editorial notes showing where to expand the text with your expertise or insight
  • A comprehensive revision letter summarizing major issues and solutions
  • 30-minute follow-up video conference call
Inquire about developmental editing
  • Bekah Buchterkirchen, Author

“My work is measurably stronger because of her.”

Working with Mary K. felt like collaborating with a trusted coach who draws out your strongest writing while refining your voice and discipline along the way. She brings warmth, discernment, and clear direction to every stage of the process. My work is measurably stronger because of her, and for that, I’m forever grateful!

– Bekah Buchterkirchen

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Learn what developmental editing is and whether your manuscript could benefit from it!

Line & Copyediting Services

Line & Copyediting

$0.03–$0.04/word

Polish your manuscript to perfection with professional line and copy editing. I’ll refine grammar, punctuation, style, and clarity while preserving your unique voice, leaving your writing smooth, consistent, and reader-ready.

The Deliverables:

  • Edited manuscript with:
  • Sentence-level corrections for grammar, punctuation, and style
  • Enhanced clarity, flow, and readability while preserving your voice
  • Consistency checks for formatting, usage, and tone
  • Suggestions for improving word choice, phrasing, and overall expression
  • Project-specific style sheet documenting editorial decisions and formatting choices for your reference
Inquire about Line & Copyediting

You may be wondering…

Unfortunately, I don’t at this time. Editing fiction requires a specialized skill set I’m still developing. I take my work (and yours) seriously and wouldn’t, in good faith, take on a project I’m not yet qualified for.

That said, I’m actively learning and plan to offer fiction editing in the future—so stay tuned!

Unfortunately, I don’t at this time. Editing memoir requires a specialized skill set I’m still developing. I take my work (and yours) seriously and wouldn’t, in good faith, take on a project I’m not yet qualified for.

That said, I’m actively learning and plan to offer memoir editing in the future—so stay tuned!

I would love to edit your nonfiction book, even if it isn’t overtly Christian. However, if your message goes against Jesus’s teaching, I may not be the right editor for you.

I take this work (and your writing) seriously. Over the past two years, I’ve invested more than 150 hours in professional development, focusing on developmental editing, copyediting, publishing, and freelance business management through formal courses, independent reading, and hands-on projects.

I have completed courses through The Christian Pen (where I am currently a member), the Editorial Freelancers Association, the Poynter Institute, ACES: Society for Editing, and Club Ed. I have also interned under Megan J. Conner, gaining hands-on experience alongside my formal training.

Finally, I make a point of reading not only current bestsellers in the Christian nonfiction space, but also the classics, continually expanding my understanding of the genre and the authors I serve.

Every project starts with a conversation about your manuscript and goals, followed by a free review of a sample of your work so I can provide a tailored proposal. Once we agree to move forward, I dive into your work—whether that’s big-picture developmental feedback, manuscript evaluation, or line-level editing.

Throughout the process, I keep communication open, so you always know what’s happening and can ask questions along the way.

I base my rates on EFA Industry Standards. Costs also vary depending on the level of editing your manuscript needs.

For a personalized estimate based on your manuscript’s needs, request a free discovery call. And if you have a specific budget, let me know—I’m happy to work with you.

Free Manuscript Review Tiller Editing Services Developmental Christian Nonfiction
  • Gain clarity on your project
  • Identify your next steps
  • Move forward with confidence
Still not sure what your manuscript needs?

A discovery call will give you clarity.

Join me for a brief, 20-minute conversation where we’ll talk through your project, what feels most challenging right now, and what kind of support will be most helpful moving forward.

Request a Discovery call!