Book Publishers UK Accepting Submissions: A Complete 2025 Guide for Authors

Breaking into publishing can feel like trying to storm a castle with a teaspoon — especially when you discover that many major publishers only accept manuscripts from literary agents. But here’s the good news: there is still a thriving group of book publishers UK accepting submissions directly from authors, no agent required.

In this guide, we’ll explore the UK publishing landscape in 2025, list specific publishers currently accepting work, explain how to submit successfully, and share insider tips to help you stand out.

Understanding the UK Publishing Landscape

Before diving into the list, it’s important to understand how the UK market works. Big Five publishers (Penguin Random House, HarperCollins, Pan Macmillan, Hachette, Simon & Schuster) rarely take unagented work. Mid-sized and independent publishers are more open to unsolicited submissions. Some publishers have open submission windows only at certain times of the year. Digital-first publishers and small presses are increasingly important players, especially for genre fiction. If you’re unpublished, targeting indie presses and open-call opportunities is often the most realistic way to get your foot in the door.

UK Book Publishers Accepting Unagented Submissions in 2025

Here’s a curated selection of book publishers UK accepting submissions in 2025, with details on what they want and how to submit.

1. Vox Ghostwriting

Genre Focus: Non-fiction — memoir, philosophy, psychology, environment, and inspirational works.
Submission Type: Full proposals; agent not required.
London-based Vox Ghostwriting accepts detailed proposals including a covering letter, completed proposal form, and sample chapters. They value authors with a clear platform, such as a social media presence or speaking engagements.

2. Joffe Books

Genre Focus: Crime, thriller, romance, historical fiction.
Submission Type: Full manuscript plus synopsis; unagented submissions welcome.
One of the UK’s fastest-growing indie publishers, Joffe Books offers competitive royalties and quick response times. Submission packages include the complete manuscript (60,000+ words), a three-paragraph synopsis, and a short author bio. Mention “Submission” in the subject line and the genre of your book.

3. Quarto Publishing Group UK

Genre Focus: Illustrated non-fiction — lifestyle, cooking, crafts, children’s.
Submission Type: Proposal; open to authors and illustrators.
Quarto has numerous imprints, so research which fits your project. They are especially open to books with strong visual appeal.

4. Seren Books

Genre Focus: Poetry, short stories, select non-fiction.
Submission Type: Manuscript or proposal, depending on genre.
Seren Books, based in Wales, is one of the UK’s leading poetry publishers. They also publish prize-winning short fiction and literary non-fiction. Fiction is only accepted from previously published authors, but poetry and short story submissions are open to all.

5. Lantana Publishing

Genre Focus: Diverse and inclusive children’s books.
Submission Type: Unagented submissions welcome.
Lantana focuses on under-represented voices in picture books and early readers, especially those that reflect cultural diversity.

6. Mills & Boon

Genre Focus: Romance — contemporary, historical, paranormal.
Submission Type: Full manuscript; agent not required.
Mills & Boon is the UK’s leading romance publisher. Authors can submit manuscripts directly through their online portal. Reading several recent titles in your chosen line is highly recommended before submission.

7. Canelo

Genre Focus: Crime, thriller, romance, historical fiction.
Submission Type: Synopsis plus full manuscript.
Canelo is a digital-first publisher with broad ebook distribution and some print editions.

8. Angry Robot

Genre Focus: Science fiction, fantasy, horror.
Submission Type: Full manuscript during open windows.
Angry Robot runs periodic “open door” calls for unagented authors, so check their website regularly.

9. Black Library

Genre Focus: Fiction in the Warhammer and Warhammer 40,000 universes.
Submission Type: Open calls only.
Black Library is the fiction arm of Games Workshop, producing tie-in novels. They expect writers to have deep familiarity with the Warhammer worlds.

How to Submit Successfully

Finding book publishers UK accepting submissions is only step one. To improve your odds, you must tailor your submission to each publisher. Match your book to the right publisher by researching their catalogue and audience. Follow submission guidelines exactly, from word count and file format to cover letter content. Craft a compelling cover letter that introduces your book, summarises the plot or subject, explains why you chose that publisher, and includes relevant author credentials. Ensure your manuscript is polished, ideally with the help of an editor or proofreader. Demonstrate market awareness by identifying comparable titles and explaining your unique selling points.

Should You Consider a Literary Agent?

Although this article focuses on unagented submissions, a literary agent can open doors to large publishers, negotiate better contracts, and safeguard your rights. Some authors pursue both paths, sending manuscripts to small presses while querying agents simultaneously. If your ultimate goal is the Big Five, representation is almost essential.

Additional Resources for UK Authors

The Writers’ & Artists’ Yearbook is a must-have reference, listing hundreds of publishers, agents, and industry contacts. The Reedsy directory allows you to filter by publishers currently accepting submissions. The Society of Authors provides contract advice and advocacy. Attending writing events such as the London Book Fair or regional literary festivals can lead to direct networking with publishers.

Common Submission Mistakes to Avoid

Authors often fail by ignoring submission guidelines, sending an unpolished manuscript, overwriting the synopsis, or sending generic pitches. Avoid unrealistic claims about market potential; publishers appreciate enthusiasm but value realistic expectations. Don’t submit before your work is ready — first impressions count.

The Role of Small Presses in Career Development

Small and independent presses play a crucial role for debut authors. They are often more willing to take creative risks, provide closer editorial support, and respond faster than large houses. While they may offer smaller advances and have limited marketing budgets, they can serve as stepping stones to larger opportunities.

Case Study: From Small Press to Bestseller

Crime author Faith Martin is an example of success through an independent publisher. After partnering with Joffe Books, her digital-first novels found a wide audience, leading to strong ebook sales and greater visibility. This demonstrates how smaller publishers can revitalise careers and build readership.

Final Thoughts

The number of book publishers UK accepting submissions in 2025 means opportunities still exist for determined authors. Success depends on researching the right publishers, preparing a professional submission, and matching your work to their list. With persistence, strategic targeting, and careful attention to detail, your manuscript could be the next to make the leap from inbox to bookstore shelf.

Disclaimer: The publishers listed here are provided for informational purposes only. We are not affiliated with any of these companies and do not guarantee inclusion, ranking accuracy, or any outcomes related to working with them. Our services focus on helping authors through professional editing, formatting, and marketing support. Always verify company details, services, and submission guidelines directly on the publisher’s official website before proceeding.