An honest, Christian approach to the body, relationships, and sex. The changes that preteens experience can be very stressful. How You are Changing is the third book in the Learning About Sex series for girls. The book explains to 9- to 11-year-olds that these changes are normal and are a part of God's perfect, unfolding plan for their growth and development. God knows His children and is with them every step of the way!