The book "The Seven Rays" is the ninth book by Vasilis Papadolia and deals with the inner meaning and astrological techniques related to the theory of the Seven Rays. This approach, which originated from the teachings of the Tibetan, has engaged many students of Inner Astrology and has created a new field of research as well as individual realizations. Aimed more at the beginner student, the book attempts to introduce the basic qualities and properties related to the Rays, while also providing some orthodox and experimental techniques that allow the reader to examine the application of this concept in studies of people and situations surrounding them.