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Jonnna Callahan
@jonna_callahan
Level 1
Author Focused Book Editor and Proofreading Expert
United States
English, Spanish, German
About me
I’m Callahan, a book editor who helps authors turn solid manuscripts into polished, publish-ready books. From developmental editing to line and copy edits, I refine structure, clarity, voice, and flow—without compromising your style. Whether you’re self-publishing or querying agents, I focus on reader impact and market expectations. Clear feedback, precise edits, and a book you’re confident to publish.
Skills
Jonnna Callahan
$10/hour
Offline •
Average response time: 1 hour
See my services
Proofreading
I will do developmental editing proofreading and manuscript formatting for novel books
Developmental Editing
I will proofread and edit format fiction novel memoir poetry sci fi romance book editor
Want to work on an hourly basis?
Tell Jonnna Callahan what you need.
$10
/
hourPortfolio
Work experience
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Book Formatting Specialist
Fiverr • Freelance
May 2023 - Present • 3 yrs 4 mos
I specialize in transforming raw manuscripts into clean, professional, and publication-ready book layouts. For this project, the client provided an unstructured document with inconsistent spacing, poor alignment, and no proper formatting. I redesigned the entire manuscript by applying proper margins, consistent typography, clean paragraph spacing, and structured chapter layouts. The result was a polished, reader-friendly format suitable for both digital and print publishing. My work ensures every book meets professional publishing standards while enhancing readability and overall presentation. I’ve successfully helped clients prepare their books for platforms like Amazon KDP and other publishing channels.
8 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 8 Reviews
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oliver_kenway
United Kingdom
Ongoing collaboration
I’m really pleased with the editing of my novel. Callahan was professional, attentive, and took the time to understand my story and preserve my voice while improving the flow, clarity, and overall reading experience. I truly appreciated the care put into my manuscript and would definitely recommend the service to other authors.
Helpful?
kristaleechaney
United States
We have are still currently working together, but she’s amazing, kind, professional, and extremely punctual!
Helpful?
dahughey
United States
Ongoing collaboration
The seller is not qualified to do the work that they are advertising
Helpful?
spanishflatlife
Netherlands
Helpful?
oliver_kenway
United Kingdom
Ongoing collaboration
Jonna did an excellent job editing my book, providing thorough feedback and polishing the manuscript beyond my expectations. Communication was smooth throughout the project, and i will definitely hire jonna again for my next editing work
Helpful?
