Heather Sangster

I'm an accomplished veteran publishing professional who has been in long-time service (since 1988) to 28 trade publishers and imprints (including three of the Big Five: Penguin Random House, HarperCollins, and Simon & Schuster), prominent authors, businesses, and emerging talent across the globe. I've been Margaret Atwood's primary copy editor and proofreader for 31 years, most recently for our 22nd title together: her 2025 New York Times best-selling memoir, Book of Lives. Contributing my editorial services to 1100+ titles so far, I'm grateful to play a part in my clients' achievements: 70 bestsellers, 154 awards, and counting. I've honed my technical expertise in multiple industries (legal, educational, academic, and trade publishing; advertising), mediums (newspapers, magazines, books), genres, and in-house and freelance roles. I'm also co-founder of Strong Finish Book Editing (formerly Strong Finish Editorial Design). We've been providing decades-long ongoing editorial support to publishers and businesses while helping emerging writers produce audience-ready professional manuscripts since 2006. Knowing what works is key. I combine classic principles, contemporary sensibilities, insider expertise, and just the right touch for a signature service with measurably superior results.

How to Hire a Book Editor

Your manuscript is ready for editing. But when you google “hire a book editor,” a mere 70 million+ results show up—and that number increases daily. Wait… What? Clearly there’s no shortage of editors, but are they any good? The self-publishing boom, turbo-charged by the global pandemic, has created a glut of self-proclaimed professionals for hire.

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