- Girls Only! focuses on the practicalities of periods, the social and personal implications of starting your period, and the physical and emotional developments in puberty. It tells you what happens and when, what you need to know and how to prepare. It answers all the questions girls are dying to ask, but daren"t, in a clear, friendly way, using real-life examples. It"s the perfect first book about periods for girls of primary school age as it provides information at the right level. The tone is positive and reassuring and complemented by quirky illustrations throughout.