Marni Seneker
Coach. Editor. Ghostwriter.
Big Ideas. Beautifully Built.
Ghostwriting, proposal development, and editorial partnership for authors shaping ideas with both depth and market resonance.
I help coaches, leaders, and experts write books that make an impact, build their brand, and accelerate their business. From ghostwriting and proposal development to coaching and developmental editing, I provide high-touch support tailored to your current needs.
You want to write a book, but you don’t have to do it alone. As your thought partner, I draw out your best thinking by asking incisive questions, listening deeply, and collating your existing content. Together, we will translate your big ideas into a powerful, cohesive book that transforms your reader, builds your brand, and converts followers into fans. I would be honored to help you bring your book to life.
High-touch, one-on-one book coaching for prescriptive nonfiction
Customized to your project, your process, and your goals.
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Free 30-Minute Discovery Call
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Not sure what kind of support you need yet?
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A short, focused conversation to talk through your book idea, your goals, and where you’re feeling stuck, so you can see if working together is the right next step.
Best for: authors exploring coaching, longer-term support, or next steps.
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Quick-Start Book Plan
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Want clarity and direction right now?
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We’ll refine your argument, clarify your reader and their transformation, and pressure-test your book idea through written feedback and a one-on-one strategy session. ​A pre-pre-pre-proposal—bite-sized, focused, and designed to help you move forward with confidence.
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Best for: authors who want concrete guidance and a clear path forward.
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Ghostwriting​
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Looking for a collaborative writing partner?
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I work with prescriptive nonfiction authors to develop and ghostwrite book-length manuscripts, from concept through final revision. The process is high-touch and collaborative, including goal-setting, interviews for content, drafting, and revision.
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Best for: experts with a clear point of view who want a trusted partner to help bring their book to life.
Publications & Testimonials
I loved working with you, it was an absolute pleasure. Your wisdom and experience with writing and publishing, and your guidance in terms of encouraging me to 'invite the reader in' and to 'trust the process' were invaluable.
Andrea Baumann Lustig, Author
Legacy on the Line, Wiley, May 2026
