This Third Edition of Volume 2 of the highly popular and best-selling The Only Way to Learn Astrology series updates the calculation material with examples using newer reference works and the whole number system. Part I explains the mathematics of horoscope calculation, with clear, easy-to-follow instructions for erecting an accurate birth chart. With this book you can develop the skills required for Certification as a Professional Astrologer. But it's much more than math alone! Part II instructs and offers interpretations for a wealth of material not often included in other basic astrology texts. You'll learn about emphasis and lacks by element and mode, chart patterns, aspect configurations, retrogrades, interceptions and more! Part III details in-depth psychological analysis plus pre-natal eclipses, Arabian parts, Vertex and Fixed Stars. Fifty-five charts of well-known people are used to illustrate the various techniques.