Principles
Ray Dalio
An introduction to metaphysics
Henri Bergson
Divine Proportions: Rational Trigonometry to Universal Geometry
Norman John Wildberger
Ignition: An Informal History of Liquid Rocket Propellants
John D. Clark
The Medieval Craft of Memory: An Anthology of Texts and Pictures
Mary Carruthers & Jan M. Ziolkowski
The Union of Isis and Thoth: Magic and Initiatory Practices ...
Normandi Ellis & Nicki Scully