Matt Oldfield grew up in Southampton, playing football with his brother Tom.

The two brothers are the authors of the bestselling Ultimate Football Heroes series – fun football biographies that tell the exciting life stories of superstars like Gareth Bale, Lionel Messi and Mo Salah, from the playground through to the pitch.

The Johnny Ball books are Matt's first fiction series. He lives in North London.

Seth Burkett is a sports writer and social media manager who has worked with some of the world's biggest football stars - including Ronaldinho, David Luiz and Wayne Rooney - to create content, as well as their own social media channels. He is the author of The Boy in Brazil, which was shortlisted for Football Book of the Year at the 2015 British Sport Book Awards and Developing the Modern Footballer Through Futsal and Football's Coming Out, which was longlisted for the 2016 William Hill Sport Book of the Year. Most recently he has released his first children's book, No Final Whistle, and worked with football YouTubers Woody and Kleiny on their autobiography.