CK-12 Trigonometry - Second Edition
Ck-12 Foundation
Figments of Reality: The Evolution of the Curious Mind
Jack Cohen & Ian Nicholas Stewart
Midlife: A Philosophical Guide
Kenneth E. Wilber & Kieran Setiya
Personal Identity and Buddhist Philosophy: Empty Persons
Mark Siderits
A Study of History: Abridgement of Volumes I-VI
Arnold Joseph Toynbee & D. C. Somervell
The Return Of Sherlock Holmes
Arthur Conan Doyle