Sepher Yetzirah, the Book of Formation, is the shortest, the most complicated and the most antique of all the books of Kabbalah.
The author is anonymous. The oral tradition dates it back to Abraham but there is no clear evidence.
The book has been quoted since the 5th century and its first commentaries go back to the 10th century.
The Book of Formation is also the key to understand Kabbalistic Astrology.
Kabbalistic Astrology is a code to comprehend the powers of one’s horoscope, its weaknesses and its potentials.
Here is a quick video introduction to the main aspects of Kabbalistic Astrology‘s interpretation.
You will find the complete english text of the Sepher Yetzirah in the e-book The Secrets Of Your Birthday, where you can find more information for each sign, including the precise indication of the traditional stone and perfume recommended by Kabbalah. You can buy it here.
The Secrets Of Your Birthday is also available as a paperback printed edition, you can check its price at all the major online retailers here.