The Cazimi Press proudly announces the first complete translation of Guido Bonatti's renowned masterpiece of astrology, the Book of Astronomy, in a LIMITED EDITION OF 500 SETS, at a price of $289.95, plus shipping and handling. All sets will be hand-numbered. Don't miss this opportunity to have this essential medieval text!


To preview and purchase the Book of Astronomy, go






2 harcover volumes, 1,583 pages, elegant dark blue cover, stamped in gold foil, Smythe sewn (not glued) for permanence


20 woodcut reproductions, 36 diagrams and tables


65-page Introduction with short essays on numerous topics by the translator


Over 4,400 footnoted citations and explanations


Table of Contents


Introduction: Includes a biography of Bonatti, biographical information on his sources, essential material on sect, the al-mubtazz whole-sign houses, "root" charts and the importance of prayer in horary, orientality, Bonatti's fixed stars, perfection in horary, the concept of "overcoming" and others. The Introduction concludes with Bonatti's own introduction and dedication to the work (65 pp).

Treatise 1: Defense of Astrology: A theoretical defense of astrology which includes Bonatti's theoretical description of astrological judgment in terms of necessity, possibility, and impossibility (26 pp).

Treatise 2: Signs and Houses: Probably the most thorough treatment of the signs and houses existing in astrological literature. Drawing on many sources, Bonatti gives an explanation of the order and assignment of the signs, dignities, the weighted-point al-mubtazz, the houses and their powers, and an introduction to delineating the rulers of one house in another (121 pp).

Treatise 3: Planets: Important especially for students of horary. After a thorough description of the planets' universal significations and their rulerships over hours, days, periods of life, and other matters, Bonatti turns to an account of modes of perfection. Drawing on authorities such as al-Qabisi and Abu Ma'shar, Bonatti describes numerous methods of perfection and the denial of perfection which pertain to all areas of traditional astrology. Bonatti's text is illustrated with 16 redesigned diagrams (101 pp).

Treatise 4: Conjunctions: Correlates the planets to each other based on the Chaldean order; describes conjunctions pertinent to mundane astrology, especially the terrible Saturn-Mars conjunctions in Cancer; the "combust hours"; and a method of rectification (14 pp).

Treatise 5: The 146 Considerations: The famous handbook of Considerations retranslated. Coley's paraphrased edition is superseded by this version, including key passages on the role of God and freedom in horary. All Arabic terms transliterated and sourced (89 pp).

Treatise 6: Questions (Horary): The most thorough treatment of horary in existence, drawing especially on earlier medieval masters. Surprising predictive techniques combine elections, solar revolutions, and horary charts. Includes two charts from Bonatti's own career. Learn whether your horse will win the race, your husband is cheating on you, or the king will fall from grace (278 pp)!

Treatise 7: Elections: A long treatise on elections, often drawing on 'Ali al-Rijal (Haly Abenragel), starting with a thorough discussion on how elections work and how to design them! Elections from all 12 houses, from when to elect surgery to when to make a journey (180 pp).

Treatise 8: Mundane Revolutions and Arabic Parts: A monumental work on mundane astrology: discovering the Lord of the Year and the Significator of the King, the condition of the people, chrography, weather and natural disasters, war, comets, eclipses, fixed stars, the Head and Tail of the Dragon. Second, a detailed treatment of Parts or Lots, including the 7 Hermetic Lots, the Parts of the Houses, using Parts in commodities speculation and political upheavel and regime changes. Over 100 Parts that cover all branches of astrology (290 pp)!

Treatise 9: Nativities: A treasure of natal astrology, drawing on Abu 'Ali, 'Umar al-Tabari (Omar of Tiberias), Ptolemy and al-Ridwan's commentary on the Tetrabiblos, and others. A detailed treatment of longevity calculations is followed by sections on physiognomy and personal character, and then all matters pertaining to the houses: prosperity and wealth, siblings, parents and their longevity, and much more. Lastly, Bonatti provides much information on predictive techniques (309 pp).

Treatise 10: Weather Prediction: A set of weather-predicting methods combining the mansions of the Moon (drawn from Jafar "the Indian") and Ptolemy (37 pp).



Benjamin N. Dykes, PhD, a leading medieval astrologer, recently completed the only full translation of Guido Bonatti's Book of Astronomy, the 13th-Century masterpiece. Dr. Dykes received his AMA (Adeptus Medievalis Astrologiae) from the renowned medieval astrologer Robert Zoller, and his PhD in philosophy from the University of Illinois, where he taught philosophy until turning to astrology full-time. In addition to his extensive translation work, Dr. Dykes also reads charts for clients worldwide.





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