Frequently Asked Questions

We’ve successfully delivered high-end services to clients all over the globe.

Ghostwriting is the process where our team does the writing for you. We integrate your ideas, thoughts and outline to create a mesmerizing story.

Our clients have complete ownership of all the content related to their project. This includes your manuscript, marketing material and blogs.

An editorial project kicks off with initial discussion with our client to get an idea about the intensity of edits required. Then, the file is thoroughly reviewed by our editors and sent back to clients for review and feedback. Once the changes are approved, a final version is produced.

Yes. With Sigma Publisher, you can find comfort in the fact that your work will never be shared or published elsewere. Other than the specific team working on your project, no one has access to your files.

Each project has different intensity and requires time accordingly. We take pride in our quick deliveries and timely project completions. On average, a project can take anywhere between 2-3 months

Our team of experts is able to cater to every project according to the specifications set by our clients.

Book Formatting services offered by Sigma Publisher improve the readability and presentablity of your manuscript. We take care of your book’s font, style, layout, spacing, etc.

Yes, our services cover all angles of your project, including financial advice and recommendations. The price of each book is dependant on several factors such as target audience, market size, profitability, etc. We recommend the selling price to our customers after through discussions with them.

Marketing Solutions offered by us cover a wide range of services including SEO optimized marketing, Social Media marking, paid advertisements, etc.

Yes, our highly competent team of writers can write SEO optimized blog posts and articles.

Sigma Publisher has multiple teams with dozen of professional ghostwriters. Each writer specializes in a different genre and writes in unique style and tone. You project is assigned to relevant writers who can mold your manuscript according to your requirements.

Yes, we do offer ISBN acquisition as a standalone service, as well as part of the complete package.

We give words to your thoughts!

Start now and avail up to 35% off on all of our packages.


Client fulfillment is our utmost priority. Ensuring that our customer base is satisfied with all our deliveries, we will guarantee that the book is well-presented and upholds all of today’s publishing standards.
Sigma Publisher will cater to all your requirements and collaborate with you to create the perfect product.

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Carole Jet

Carole Jett

'I must say that my experience with Zach the project manager and his team was terrific. They guided me along in the editing and process and were not only helpful but patient. Zach was a personal pleasure to deal with. I also learned along the way and was able to even improve upon my own writing and punctuation. He was always responsive to my questions and problems.'

Azra Hazarika

Azra Hazarika

'Kudos to the amazing team and for sure the people behind it. I've been struggling to publish for years and on a fine October morning I call Sigma Publisher and get connected to Daniel. Since then they have made my dream possible and thank you Zach for being available throughout the entire process, and whatever of an issue I'd, he responded me with patience and dedication. I felt heard and I'm glad my book "An Art of Love" is out there and seeking your love for the same!'

Ferals J M Oxford

Ferals J M Oxford

'I finally connected with Daniel Green after being introduced to a few staff members. This review reflects my experience with Sigma Publisher as a direct result of Mr. Green's exceptionally professional and personable manner. My goals were reviewed and created to avoid confusion. Opportunities to further develop the creativity of my project(s) were made available - and resulted in explosive success! APS offers various services; however, finding the right agent made all the difference to me. I was not rushed or exploited. Daniel Green was very attentive to my personal preferences; such was the determining factor to remaining a client.
Thank you,'

Kelly Zabinski

Kelly Zabinski

'I struggled for a year trying to get my book published. I was able to do everything from the art and writing but couldn't find a way to get my book out there. Daniel and his team made it possible and did it so fast! Most places charge you an arm and leg, but they offer amazing deals you can't beat. I will continue to go to them for my future books They made it so easy!'



'From the first call and throughout the process the team at Sigma Publishing has been there to help my project push forward. My project manager (Daniel) was very kind and helpful in making this first book that is designed to help others possible. We are at the finish line together now and awaiting publishing. Another review to come... I do recommend giving them a call for your next book.Thank you to all involved.'



'Daniel Green has been very available and helpful in publishing my children's book. We had a few miss communications and some editing problems but in the end the book is just as I had hoped. Daniel was always courteous, patient and ready to help with all the issues this first time publisher had. Thanks'

Myungja Koh

Myungja Koh

'I created a children's book and considered it to publish as self-publishing by KDP. But it's a debut book, and I worried it doesn't look professional because of poor formatting, so contact Sigma Publisher. Most of all, Mr. Frank Cooper is an excellent manager. He helped to publish them one by one as if he is a personal coach. Thank you so much!'

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