The nation's favourite doctor, Dr Ranj, is here to explain everything a boy needs to know to grow up happy, healthy and confident.

Dr. Ranj Singh (Author) 
Dr. Ranj Singh is a NHS paediatrician and BAFTA-award-winning TV presenter. He co-created the hit CBeebies' show Get Well Soon, and has presented numerous other series including ITV's prime-time Dr. Ranj: On Call, Save Money Lose Weight and Save Money: Good Health, and Extreme Food Phobics for the W Channel. He's also a contributor for ITV This Morning and Tonight, as well as BBC1's Morning Live, The One Show, and Inside Out. 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. His guide to puberty for boys, How to Grow Up (and Feel Amazing!), was a Sunday Times bestseller.

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