Dr Mike Goldsmith studied the philosophy of time and space at Keele University, UK, where he also obtained his PhD in astrophysics. He was formerly the head of Acoustics at the UK's National Physical Laboratory and is now an author of non-fiction books for children, including the Kingfisher Space Encyclopaedia.

Clive Gifford is an award-winning author of over 150 books for children and adults. Clive is the winner of the prestigious Royal Society Young People's Book Prize in 2014.

Clive's recent sports titles include The Official EURO 2016 Fact File, The Official England Rugby Junior Supporters' Guide and Champions League Fact File, all for Carlton Books. He is a life-long supporter of Queens Park Rangers.

Sean Callery originally trained and worked as a journalist before he became a primary school teacher.

He writes both fiction and nonfiction and has written over sixty books for children. He has a particular passion for history and has a knack for mining little tantalising nuggets of information that you might have missed before.