PERIOD founder and Harvard College student Nadya Okamoto offers a manifesto on menstruation and why we can no longer silence those who bleed—and how to engage in youth activism.

Throughout history, periods have been hidden from the public. They’re taboo. They’re embarrassing. They’re gross. And due to a crumbling or nonexistent national sex ed program, they are misunderstood. Because of these stigmas, a status quo has been established to exclude people who menstruate from the seat at the decision-making table, creating discriminations like the tampon tax, medicines that favor male biology, and more.

Period Power aims to explain what menstruation is, shed light on the stigmas and resulting biases, and create a strategy to end the silence and prompt conversation about periods.

"A must-read for anyone who wants to make change at the state and national levels.” - Mashable

"If you’re looking for a way to turn your anger about gender inequality into action, this book is a must read. You’ll learn a great deal about menstrual inequities and the intersectional impacts created because of our failure to address them. This is a how-to handbook on what you can do to change that." - Former state Senator Wendy Davis

"Period Power, much like it’s author Nadya Okamoto, is insightful and impossible to ignore. I’ve found empowerment in her prose, and inspiration in her lack of shame. This book teaches adults and youths alike to be unapologetically proud to bleed. If someone you love has a vagina then Period Power is required reading." - Whitney Bell, activist and founder of Kidd Bell

"*“[T]ruly intersectional and…a useful guide for activists inspired by this work…A smart, honest, and comprehensive education on movement building and menstrual rights.”" - Kirkus Reviews, starred review

"This book is very interesting as it addresses an important issue related to the power of women. I hugely recommend you read it and learn its wisdom." - Muzoon Almellehan, youngest UNICEF ambassador

"Nadya Okamato's book, Period Power, is filled with information crucial to being a good person in this world. Periods affect more than half of the world's population. If this blurb makes you uncomfortable because I'm talking about menstruation, you NEED to read this book. Change the cycle." - Schuyler Bailar, transgender man on the Harvard swim team

"“Okamoto writes with passion and power, her voice clear and straightforward…[an] empowering book.”" - Booklist

"A must-read for anyone committed to gender equity. Nadya Okamoto educates and activates in her personal manifesto aimed at getting rid of the stigma around periods and beginning honest conversations. Her mission includes changing policies which cause menstruators to experience financial burdens and social separation based on a normal life cycle event for half of the world's population. It is well-past time to talk and act, and Nadya's book is a great anthem to organize the movement." - Kathleen Sebelius, 21st Secretary of the US Department of Health and Human Services