Sonny Marr

Sonny Marr - Editor

London, UK

Editor and pitch writer for fiction and personal memoir. I will shape your manuscript and offer guidance on how to get it published.

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I am a professional Commissioning Editor specialising in fiction and personal memoir. I love working with authors at the start of their career. I will take your manuscript from rough draft to polished manuscript whilst offering support and guidance on how to navigate the publishing industry. I am particularly skilled at helping writers hone their pitch to ensure that literary agents and publishers sit up and take notice.

With 6 years’ experience in trade publishing, I have edited numerous Sunday Times and NYT bestsellers and worked with authors such as Sophie Cousens, Susan Lewis, Kathy Reichs, Pet Shop Boys, Kiersten Modglin and many more!

I am available for copyediting and proofreading, but the most valuable service I offer is in shaping your manuscript to ensure that it reaches its most compelling and commercial potential.

English (UK)
Biographies & Memoirs
Coming of Age
Contemporary Fiction
Mystery & Crime
Women's Fiction
Young Adult

Work experience

Commissioning Editor

June, 2021 – Present (12 months)


Penguin Random House
September, 2016 – June, 2021 (over 4 years)

Portfolio (5 selected works)

This Time Next Year

Cousens, Sophie

Sonny has 10 reviews

Communication & Punctuality
Communication & Punctuality

Alex Simons
I chose Sonny, not only because of her expertise, but because of her enthusiasm for my novel. She gave invaluable advice and encouragement throughout the editing process and has been very creative throughout. I think it's fair to say that we are both very happy with the final version. Thank you Sonny!

Alex Simons, April 2022

Allison Zatarain
Sonny is a true gem. She took the time to read my manuscript, have a conversation with me about it, and then drafted a comprehensive "Editorial Assessment." She understands writers well (for me it was scary to share my work!) and was gentle and kind in her review while simultaneously offering VERY constructive and actionable suggestions for the next edit. I believe that she truly cares about wr...
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Allison Zatarain, March 2022

Bryan Havel
I cannot say enough good things about Sonny; she was truly outstanding in every conceivable way. I highly recommend her to any and all writers, especially up and comers still seeking to hone their craft. Sonny's attention to detail is exquisite, her suggestions were extremely helpful and communication was very easy. Five stars frankly isn't enough; she deserves more.

Bryan Havel, March 2022

Hannah Barrick
I have really enjoyed working with Sonny. Communication was excellent keeping me updated throughout, and as a new author working on my first novel, her comments have been very constructive in helping me work out how I can move forward with my book. I would definitely use Sonny's services again and would recommend her to any authors who are considering hiring an editor. Thank you so much Sonny!

Hannah Barrick, February 2022

Hans Christopher Assi Adou
Sonny's notes were very helpful to me and she gave me the indications I needed to create a work of quality.

Hans Christopher Assi Adou, February 2022

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