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1900
Our Fate and the Zodiac by Margaret Mayo
Astrological literature
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1901
Llewellyn
George establishes the Llewellyn Publications Company and The Portland School of Astrology in Oregon. He avoids the Hermetic and magic
area of astrology, as well as tarot, numerology and witchcraft.
Paul Choisnard, an eminent astrologer in France pursues the scientific
side of astrology. His first major work is Influence Astrale, published in Paris.
1902
Astrology in a Nutshell by C.H. Weber
1904
Casting The Horoscope by Alan Leo is published.
Influence of the Stars by Rosa Baughan
1905
The Occult Review is launched by Ralph
Shirley.
Llewellyn George begins issuing the Astrological Bulletin.
The Progressed Horoscope by Alan Leo is published.
1906
The Annual
Moon Sign Book is started by Llewellyn George.
John Dreyer's History of the Planetary systems is published.
1907
Bible Astrology:
The 12 Signs of the Zodiac by Lyman E. Stowe
1908
Max Heindel establishes first center for Rosicrucian Fellowship, an order similar
in principles to the Theosophical Society except that it puts more emphasis on astrology. Following the Ohio center, Heindel establishes
centers in Seattle and Portland in Washington. The order is known for its ephemeris and Table of Houses.
1909
The Rosicrucian Cosmo-Conception
is published by the Rosicrucian Fellowship. It is Max Heindel's major work, originally inspired during his trip to Germany in 1907.
1910
The Gospel in the Stars by Joseph A. Seiss
1911
The Rosicrucian headquarters is moved to Oceanside, California.
Practical Astrology
For Everyone by Llewellyn George is published by Bulletina.
1912
Spiritual Beings In The Heavenly Bodies by Dr. Rudolph Steiner.
The
Art of Synthesis by Alan Leo comes out. It focuses on in-depth analysis of the planets, triplicities and quadruplicities.
1914
Evangeline
Adams is arrested for fortune telling. But after she accurately depicts the character of the Judge's son from an anonymous charts
in a test during the trial, the case is dismissed.
1915
Sepharial publishes a forecast that predicts great upheaval in the 1990s,
ending around 1997.
1916
Stars of Destiny by Katherine Taylor Craig on of first two books published by a non- astrological publisher,
E.P.Dutton.
Before 1920, astrology books were published by astrological publishers or privately by the authors themselves.
The Sun Book by John
Hazelrigg is published. This work adds more Hermetic insights, similar to those exposed in the works of Karl Anderson, mostly biblical
astrology.
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Societies and periodicals
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1917
Elspeth Ebertin publishes The Prophetic Annual in Germany and becomes well-known
with tremendous fellowship.
Astrophic Principles by John Hazelrigg.
Waite's Compendium of Natal Astrology is published
1919
Your Destiny
in the Zodiac and its Mastery by Louis Brownell
1920
Raphael's The key to Astrology is published by D. McKay.
Charles E.O. Carter
serves as the first principal of the London Faculty of Astrological Studies and as president of the
Astrological Lodge of the Theosophical
Society until 1952. He is editor of the Astrologers Quarterly from 1926 to 1959.
Investigations Into Occultism by Rudolph Steiner
delves into souls, karma and Christian and Rosicrucian astrology.
1922
A series of connections leads to an explosion of astrology
in Germany. It begins when O.A. Schmidt publishes The Spirit of Astrology which interests Count Hermann Kaiserling, who forms the
School of Wisdom at Darmstadt, which in turn spawns other schools of astrology.
Everybody's Astrology (1922 reprint of original) by
Magnus Jansen
1923
Paul G. Clancy begins publishing the famous American Astrology magazine, which becomes the longest running astrological
periodical.
Llewellyn George and A.Z. Stevenson form The American Astrological Society.
New York astrologers form the Astrologers'
Guild of America.
The first German astrological congress is organized in Munich. A second takes place in Leipzig in 1924. This leads
to the formation of astrological societies and groups all over Germany. By the end of the 1920s, there are six periodicals on the
subject.
Marc Edmund Jones forms The Sabian Assembly.
1924
Wynn (Sidney K. Bennett) launches Wynn's Magazine and a publishing business.
Ronayne's Book of Freemasonry. The Encyclopedia of Psychological Astrology by Charles E.O. Carter.
Walter A. Koch begins publishing
in the astrology periodicals of Germany. He is known for his system of houses, which is based on the Regiomontanus system.
1926
Charles
E.O. Carter is editor of the Astrologers Quarterly from 1926 to 1959.
The Bowl of Heaven by Evangeline Adams is published.
1927
Llewellyn
George forms the National Astrological Society.
Your Place in the Sun by Evangeline Adams is published.
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Pure astrology
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1928
The American Federation of Astrologers is founded with the aim of disconnecting astrology from the mumbo-jumbo of magic.
Simplified
Scientific astrology is published by the Rosicrucian Fellowship.
1928
Reinhold Ebertin launches 'Mensch in All' a periodical devoted
to new astrology techniques, and which later is renamed to Kosmobiologie.
1929
The Earth in the Heavens and The Stars: How and Where
They Influence written by L. Edward Johndro are published. His background in electrical engineering reflects in his writing which
is extremely precise, complex and "electromagnetic-oriented."
1930
Percival Lowell discovers Pluto.
R.H. Naylor is invited by the
editor of The Sunday Express to cast the horoscope of the newly born princess Margaret Rose, daughter of king George VI. He predicts
future events in the Royal family which eventually come true. In another article in the same paper, he makes an accurate prediction
concerning a British aircraft and becomes famous overnight. Naylor is the father of sun-sign astrology, as he was the one who invented
the Sun sign newspaper column.
Astrologische Farbenlehre by W. Koch is published. Koch presents a unique link between colors and astrological
factors.
Astrology, Your Place Among the Stars by Evangeline Adams
1931
Evangeline Adams predicts in her Monthly Forecasts that the
United Sates will be involved in a great war in 1942, which proved to be amazingly accurate. Her Astrology for Everyone is another
addition to her list of published books.
Psychologische Farbenlehre by W. Koch is published. More humanistic-cosmo-biological psychological
astrology.
1932
The Church of Light is incorporated by C.C. Zain (Elbert Benjamine) America's most prominent astrologers.
Planetary
Effects on The Stock Market by J.M. Langham
1933
Astrologer's Searchlight by Llewellyn George is published.
Astrology: Mundane and
Spiritual by S.R. Parchment
Albert Einstein has interest in astrology according to his quote: "Astrology is a science in itself and
contains an illum- inating body of knowledge. It taught me many things and I am greatly indebted to it." source: Astrology by Solange
de Mailly Nesle pub. by Inner Traditions International 1985 - ISBN 0-89281-105-6 - p.107
1934
Al-Biruni's Book of Instruction in the
Elements of the Art of Astrology is translated by R. Ramsey Wright.
Principles of Horoscopic Delineation by Charles E.O. Carter is
released to public.
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Specialization and science
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1935
Fritz Brunhubner's Pluto marks not only one of the first attempts to
understand the meaning of the newly discovered planet but also the idea of devoting an entire book to astrological influence on one
planet, and perhaps the era of astrological specialization.
By the late 1930s, astrological forecasts are found in every major newspaper
in the West.
Heaven Knows What by Grant Lewi is published by the prestigious Doubleday Company. Lewi is known for emphasizing behavior-oriented
astrology at a time when sensational event- oriented astrology is still in fashion. He uses and advocates only transits for predictive
purposes.
1936
Astrology of Personality by Dane Rudhyar raises awareness of the new humanistic form of astrology.
1938
The Principles
of Scientific Astrology by W. J. Tucker.
Your Path To Success by Wynn (Sidney Kimbal Bennet). Wynn is probably the first astrologer
who investigated progressions thoroughly and to conclude that they are worthless.
The Friends of Astrology is formed in Chicago, which
leads to the formation of the AFA, American Federation of Astrologers.
The American Federation of Astrologers is established with
Ernest A. Grant as its first president. It becomes the leading and most prestigious of all the astrological organizations.
1939
Llewellyn
George is honored by the American Federation of Astrologers with a life-long membership.
Kraft's Treatise in Astrobiology is published.
His theories are based on testing charts from public records using statistical methods, replicating Choisnard's work and laying the
foundation for future work by the Gauquelins. During the War, he does charts and astrological intelligence work for the Nazi regime.
1940
Reinhold Ebertin publishes Kombination der Gestirneinflusse (Combination of Stellar forces) which is to become one the most important
modern textbooks of astrology.
Astrology for the Millions by Lewi (William Grant Lewi) is published. In it he stresses the 'exclusive'
use of transits as the only reliable system of prediction. Lewi is also editor of the prestigious Horoscope Magazine.
1941
Marc Edmund
Jones Guide to Horoscope Interpretation is published by McKay. In it he presents the importance of multiple planet patterns in chart
delineation.
1942
Reincarnation by Manly P. Hall is published.
1943
The Pulse of Life by Dane Rudhyar is published.
1944
Doris Chase
Doane passes the 21 Brotherhood of Light courses and begins teaching classes at the Los Angeles Church of Light. She is known for
writing more than 1500 articles on astrology and many books which become standard astrology references
1945
Astrological Lore of All
Ages by Elbert Benjamine comes out.
Astrology, How and Why it Works by Edmund Jones is published. Jones uses flamboyant language which
appeals to high class astrology enthusiasts. | 
