Starting to have periods is something every girl faces and is one sign of growing up, but the subject is often clouded by rumours and embarrassment. Have You Started Yet? explains exactly what periods are, why they happen and how they will affect you. It asks the questions and gives the answers simply and openly, with plenty of practical advice.

Ruth Thomson is an award-winning writer of non-fiction books for both children and young people. She writes on an eclectic range of topics, including history, writing skills and art and design, as well as on the human body and health. She also travels widely, collecting recycled artefacts and stories about their makers to exhibit in museums and galleries.Chloë Thomson is a Psychology graduate with a particular interest in eating disorders, teenagers and health. She has worked on the development of leaflets and posters for several health campaigns for a major cancer charity. Chloë currently splits her time between writing and working as a camera assistant for both television and film.