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editorial services



Making your text shine.

From light- to heavy-editing, STH offers copyediting services for all kinds of text. Unsure what level of editing your project requires? Contact STH for a free initial assessment and quote.


Connecting the dots.​

Essential access points for your readers to connect with your text, indexes can be critical to the success of your book. STH offers comprehensive indexing services for all types of books.


Perfecting the details.

Proofs need to be perfect prior to publishing or posting. With a keen eye for details, STH will carefully review your document to catch and resolve any typos, formatting issues, or other errors.

New Authors

Working together.

Novice author? First time self-publishing? Not sure where or how to begin? STH is open to working with authors of every experience level. Contact STH today to discuss your project.


Samantha Tillie Holtgrewe is a freelance copyeditor, indexer, and proofreader. She started STH Editorial Services in 2018 after completing UC Berkeley Extension's Sequence in Professional Editing and Indexing: Theory and Application courses.

Samantha earned a bachelor's degree in art from Skidmore College and worked in art education, college advising, administration, and office management before becoming a full-time freelancer. She enjoys reading, creating art, cooking, and spending time with her family in her free time at home in Upstate New York.

For more information, availability and scheduling, or assessments and quotes, email Samantha below or at

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