Yes, Olympia Publishers are a legitimate, long-established London-based publishing house that has been in operation since 2005. Olympia Publishers is a member of the Independent Publishers Guild, and has secured several awards, including the Independent Publisher of the Year 2017 and the Independent Small Publisher of the Year 2019.
While Olympia Publishers does prefer to work with agents and accept submissions from most countries, they are open to authors who are unable to secure representation. They are dedicated to providing authors with maximum exposure and the best marketing services in order to ensure a wide readership.
Olympia Publishers’ areas of specialization include public history, life-writing, film & TV, popular culture, health & lifestyle, travel, educational and trade fiction and non-fiction. They also provide editing and illustration services. Book covers from Olympia Publishers can generally be found in physical bookstores, as well as popular online retail sites such as Amazon and Barnes & Noble.
Overall, Olympia Publishers are a well-respected, veteran publisher with dozens of successful books to their credit, including titles that have been shortlisted for prestigious awards like the Costa Book Award. They also have a solid track record of helping independent authors reach a wider audience. For more detailed information, have a look at their author guidelines here: https://www.olympiapublishers.com/author_guidelines.