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Providing access to the original source texts in the history of science and history of mathematics.

Last Updated 5 July 2014

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Complete listing of our present and future titles.

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What's New:

Apollonius, Conics: Books I-IV.

A combined edition of Conics Books I-III and Conics Book IV, previously available only as separate volumes. 
The entire surviving Greek text
in the only English translation.


Green Lion Press is a small publishing company owned and operated by two independent scholars in Santa Fe, New Mexico. Our specialty is providing access to original source texts in history of science, history of mathematics, and history of ideas. We are committed to producing high quality books at reasonable prices.

We welcome your comments, suggestions, and queries. Contact us.



Ptolemy's Almagest: Introduction to the Mathematics of the Heavens.  Translation by Bruce M. Perry. Edited by William H. Donahue.

A new translation of selections of Ptolemy's Almagest for a Ptolemy reader. The book includes notes to assist a nonspecialist readership.

Designed as a text for use in courses, it contains extensive introductions to the celestial phenomena and to Ptolemy's world system, as well as preliminaries to the individual books of the Almagest. The selection includes Ptolemy's presentation of the form of the universe, the mathematical tools necessary to construct planetary theories, and the theories of the sun, Venus, Mars, together with an account of retrograde motion and the procedure for computing planetary positions for any date. This selection constitutes a lucid introduction to Ptolemy's extraordinarily powerful constructions and his amazingly sophisticated mathematical methods.

The translation and notes have been extensively classroom-tested at St. John's College, and are now undergoing final revision for general publication.

About the Green Lion and its Caregivers

Photo of CaregiversThe Green Lion lives with its caregivers in its lair in the mountains above Santa Fe, New Mexico. Its tawny mountain lion cousins can be seen on the next ridge. Coyotes sing nightly outside the window, undoubtedly wishing they could be as green, as feline, and as alchemically powerful as our handsome beast.

The Green Lion's caregivers, William H. Donahue and Dana Densmore, are independent scholars whose special interests are the primary texts in history of science, history of mathematics, and history of ideas. They have studied and taught these texts at St. John's College and elsewhere and since 1995 have been designing and producing the books they love.

The Green Lion is also lovingly cared for by Associate Editor Howard J. Fisher.

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