Logic: A Very Short Introduction
Graham Priest
Annals of the Western Shore (Gifts, Voices, Powers)
Ursula K. Le Guin
Thus Spake Zarathustra: A Book for All and None (Common)
Friedrich Wilhelm Nietzsche
On the Application of Inductive Logic
Rudolf Carnap
Theory of the Earth
Thomas Nail
Earthy Realism: The Meaning of Gaia
James Lovelock & Mary Midgley