Kieron Connolly is a commissioning editor at Old Street Publishing. Previously, he held editorial roles at Bloomsbury, Amber Books Ltd and at Weldon Owen, and has worked in a freelance capacity for HarperCollins, the United Nations Development Programme, Elwin Street Productions and Omnibus Press. For Little, Brown, he helped compile James Blunt's tweets into How To Be A Complete and Utter Blunt. 

For more than a decade he worked for The Mail on Sunday books desk, liaising with publishers in finding compelling stories in non-fiction that would work as strong serialisations. As a journalist, he has also written for the Daily Mail and The Times. As well as working as a freelance editor with writers on their non-fiction and fiction, he is also a reader of film and television scripts for the feedback service The Literary Consultancy.

As an author, his books include Dark History of Hollywood (updated in 2023 as The History of Hollywood) and Bloody History of America (updated in 2023 as The History of America). His book Abandoned Places launched the Abandoned series for Amber Books. For Amber he has written two more titles in this series: Abandoned Castles and Abandoned Civilisations, as well as Forests. For children he has written Stories of the Constellations: Myths and Legends of the Night Skies, Disasters, World's Worst Monsters & Villains, A-Z of Dinosaurs and, as co-author, Dragons. His books have been translated into nine languages.

In 2021, his short story The Errand was chosen as runner-up - out of 600 entries - in the Dinesh Allirajah Prize for Short Fiction. It is available as a single short story eBook.

Kieron studied history at the University of Edinburgh and screenwriting at the National Film & Television School, where he co-wrote two multi-award-winning short films.

He lives in London.