A young woman with curly brown hair and glasses smiling, wearing a beige sweatshirt, standing outdoors near a stone wall with blurred green trees and blue sky in the background.

I’m a professional editor, proofreader, and founder of my freelance business,
MST Editorial LLC.

Hello, I’m Miriam (Sabrina) Taveras.

In all aspects of the production workflow, I leave no stone unturned.

I’m a freelance developmental editor, copy editor, and proofreader with over 5 years of experience delivering market-ready manuscripts. I have a multi-genre track record of guaranteed polished editorial work, from my early and direct exposure to the publishing industry via my graduate studies at Emerson College to copyediting and proofreading 75+ fiction and nonfiction titles for Penguin Random House’s Crown Publishing Group.

I’m a versatile freelance expert across the entire production workflow—from developmental editing to typesetting—trusted by trade publishers, indie authors, literary magazines, and advisory firm publications in the education sector to deliver exceptional quality under rigorous deadlines.

Check out some of the work I’ve been involved in.

How Can I Help?

Open book on a windowsill with a view of trees and buildings outside, in soft natural light.

  • This is the big-picture look at the forest. Through a developmental edit, I look at your manuscript from a bird's-eye view, massaging your story with the deep care it deserves. Together, we will explore what is working hard and what can work harder within your manuscript: plot cohesion, pacing, characters arcs (for fiction), factual integrity and research (for nonfiction), and overall narrative flow. You will receive a comprehensive editorial letter and a roadmap of actionable insights, helping you shape your raw ideas into a powerful, beautifully structured narrative.

  • This is the detailed view of the trees. Line editing is where we focus on the poetry of your prose. Working sentence by sentence, I help elevate your unique creative voice. We will tighten your pacing, refine your word choices, and smooth out transitions. My goal is to ensure your language sings, your descriptions resonate, and your readers remain utterly immersed in the world you've built or the story you’ve chosen to tell.

  • Where line editing looks at the trees in the forest, copyediting and proofreading look at each leaf of the tree. With a sharp eye and gentle touch, I comb through your manuscript to mend grammatical slips, spelling errors, and punctuation mishaps while preserving your style. From catching lingering typos to ensuring consistency across every chapter, I handle the mechanics so your storytelling can take center stage.

  • My typesetting and layout services transform your finished manuscript into a professional book that feels wonderful to read. I meticulously craft everything from elegant font selections and chapter headers to balanced margins and responsive digital layouts. Whether you are aiming for a classic print layout or a flawless ebook, I will visually polish your words and finally make your dream book a reality.

  • Writing can often feel like a solitary pursuit, but you don't have to navigate it alone. I offer personalized consultations and specialized support tailored to wherever you are in your creative process. Whether you need a sounding board or a strategic map, we can work together through:

    • Writer Coaching: One-on-one guidance to help you overcome creative blocks, develop sustainable writing habits, or brainstorm your way through a tricky plot point.

    • Editorial Assessments: A more detached reading of a (usually partial) draft than outright developmental editing of a full manuscript, to give you an honest look at what’s working beautifully and where your story has room to grow, before you dive into heavy rewriting.

    • Query Letter Reviews: When you are ready to send your book out into the world, I’ll help you craft a polished, compelling pitch and synopsis that captures the heart of your story and catches the eyes of literary agents.

Ask me more!

  • "Miriam was a joy to work with. While supportive of me as an author, in both her developmental and line edits, she was incredibly thorough, perceptive, and sharp. She has a deep grasp of all aspects of writing craft. Her developmental comments challenged me in constructive ways to deepen my memoir through more attention to reflection and more show-not-tell in key moments. Her line edits made the text crisper. My memoir is much improved because of Miriam's fine work."

    —Dan French, author of The War Comes Home

More About Me

I’m a first-generation immigrant Latina from the Dominican Republic, currently living in Ocala, FL. After nurturing my love for words all throughout my childhood, I moved to the United States to pursue a career fueled by editing and book marketing.

In 2021, I published my honors undergraduate thesis as a chapbook of immigration poetry, as well as an independent research presentation formulating solutions to the internal lack of Latine diversity in the publishing industry. As of today, I’m the freelancer editor and proofreader behind MST Editorial LLC.

I love reading poetry, nonfiction essays, memoir, fantasy, and literary and speculative fiction. When I’m not editing, writing, or reading, I’m playing Pokémon for the umpteenth time.

Want to learn more? Contact me via email or my social media pages below.

A young woman with curly hair and glasses sitting and reading a book in a cozy indoor setting.