Knowledge of the laws of niddah is absolutely essential for every married woman, and in this new book, Rabbi Forst performs an invaluable service. Unlike his previous works, this book is not geared for someone studying the subject in depth. Instead, it is tailored to the specific needs of women and contains several chapters that are particularly important for kallot. It is complete, yet not too technical, so that one will not be overwhelmed by the material. It is authoritative, but does not claim to replace the competent Rav. It will remove unnecessary doubt and insecurity from countless delicate family situations, and let conscientious people know what to do and when and how to ask.