Benedict de Spinoza 
The Spinoza Collection [EPUB ebook] 

By laying the groundwork for the Enlightenment and modern biblical criticism, including modern conceptions of the self and the universe, Spinoza came to be considered one of the great rationalists of 17th-century philosophy.
The Spinoza Collection features:
A Theologico-Political Treatise
Political Treatise
On the Improvement of the Understanding
The Ethics
and
Spinoza's Correspondence