I am interested in natural planning from a "crunchy" perspective, i.e. I don't want to use birth control while I am breastfeeding. So I liked the way this book clearly explains natural family planning, charting, avoiding, etc. I used it along with the book Taking Charge of Your Fertility, 10th Anniversary Edition: The Definitive Guide to Natural Birth Control, Pregnancy Achievement, and Reproductive Health and the website of the same name. It does take a while to get the hang of it, but I appreciate having an alternative birth control method. Good luck to you!