Thirteen Moons is a handbook and journal that teaches you how to chart your menstrual cycle and how to notice the changes you experience through each cycle. There is so much more to the menstrual cycle than the biology lesson given to explain it, in the same way that there is so much more to sex and childbirth than the mechanics. The menstrual cycle is a cycle to base your life around, in fact your life is based around your menstrual cycle whether you realise it or not, whether you pay attention to it or not. Why not pay attention? So much more will make sense; you will make sense to yourself! Learn to chart your cycle, become aware of the daily changing influence of the moon phases (the lunation cycle) and the effects of the Earth's season and where you are in your life seasons. Charting your cycle can reveal so much to you about yourself. You will come to know the patterns in your energy levels, creativity, libido, and moods. Your cycle is a rhythm all your own to plan your life around. It has a huge impact on your experience of life and charting your cycle helps you come to understand and more easily flow with this. Once you understand your cycle and the other cyclical influences, you will be better able to "go with the flow", working with your body and your cycle rather than ignoring it. You can make your plans to suit you, do things when you know you will have the energy, retreat when you know you will feel to, use your creative energy when you have it. Each cycle provides a woman with the opportunity to understand and read the messages her body gives her for any specific healing she needs. Each cycle creates the opportunity for as much spiritual growth and personal development that she could want. There is powerful transformational magic inherent in the menstrual cycle. All a woman has to do to connect with that potential is simply to be with what is, her cycle, happening whether she's paying attention or not.