I specialize in copyediting and proofreading fiction for readers of all ages.

In the past nine years I have been hired as the copyeditor, proofreader, or production editor on more than 600 books for clients that include Penguin Random House, Simon & Schuster, Macmillan, and HarperCollins Publishers. Before that I was an in-house copyeditor at Random House Children’s Books and an in-house production editor at Penguin.

Among the books I’ve worked on are a National Book Award finalist, a Hugo Award winner, three Top 10 Books of the Year selections, and several instant #1 New York Times bestsellers.


Spelling, punctuation, grammar, timeline, character traits, and scene blocking. Nothing goes unchecked.


Ensuring your book pages are perfectly typeset and error-free.

Production Editor

I’ll find your copyeditor and proofreader, set deadlines, and oversee edits from manuscript to final pages.


Alt text copywriting, text Americanization, cover copy edits, e-book quality control, and more. See the Services page for details or contact me with any editorial-related needs you don’t see here.


Tricia Callahan did a flawless and extremely professional job copyediting an 80K word manuscript for me. She created a beautiful style sheet and in our work process was flexible, punctual and kind—a total pleasure to work with! I cannot recommend her highly enough and very much look forward to working with her again.

Elizabeth Doyle Carey

I screened editors for a book manuscript, selected Tricia, and was thrilled with the results. She easily earned five-stars across the board. In fact, Tricia went the extra mile, far exceeding what was expected in terms of quantity and quality of edits. As an indie author on a tight budget, I was concerned about cost. She proved to be worth every penny (and then some). Highly recommend her.

Jeff Langholz