Ranjit Singh 
Dr Ranj: Dysgu am Dyfu a Theimlo“n Wych – Llawlyfr i Fechgyn 

The nation“s favourite doctor, Dr Ranj, is here to explain everything you ever wanted to know about puberty – plus lots more. What does it mean to be a boy? And I“m not just talking about what you have between your legs, but what life is really like for boys. Everything I“ve learned from my career as an NHS doctor and my experiences is in this twenty-first-century guide to being a boy.