Here are links to free versions of books. Some we might read and review here on the website. Some are key texts for various philosophies you will find here.
Western Philosophy
Meditations by Marcus Aurelius
The Discourses of Epictetus with the Encheiridion and Fragments
Eastern Philosophy
The Essential Tao by Thomas Cleary (With Tao Te Ching and Chuang-Tzu)