Dr. Ranj Singh is an NHS paediatrician and one of  the resident doctors on ITV's This Morning. He co-created the BAFTA-award-winning CBeebies series Get Well Soon, and co-presents ITV's prime-time Save Money Lose Weight and Dr Ranj: On Call.
Dr. Ranj's first non-fiction book for children, How to Grow Up and Feel Amazing, shot straight into the Sunday Times bestseller chart and received glowing reviews.

He was a hugely popular contestant on 2018's Strictly Come Dancing. Off-air, his work can be found in numerous magazines and on websites where he gives expert opinion and advice on a range of physical and mental health matters.

David O'Connell is a writer and illustrator living in London, UK. He  works mostly in children's books.