Periods: Everything You Need to Know is the go-to guide for modern tweens, teens and beyond about all things period.  From Emily MacDonagh, doctor and children's book author. Dr Emily takes on periods. This book won’t just focus on the week of your period – it will go into detail on what happens on each day of the cycle, how the hormones change across the month and bust any period myths you might have heard. Every body is hormonal, and that is actually a good thing. In Periods: Everything You Need to Know, discover: What actually happens during each cycle How your body is affected by hormones and how these control the way your monthly cycle works What period products are on the market right now, and which ones might work for you. Periods: Everything You Need to Know is your no-nonsense guide to all things period.