This book can be used at any time. In the natal chart of every person, Mercury occupies a specific house and sign, influencing this sphere throughout life. The transiting Mercury sequentially influences each house of the horoscope, gradually affecting all spheres of a person's life. With the help of this book, one can learn how to use each transit of this planet for the benefit of oneself and others. The book can serve as a guide for those who are learning to interpret transits.