Welcome to FEWD humanism project page with some basic sources:

The FEWD recommends to start with the Handbooks on Humanism / Secularism.

Also very usefull are the  Humanist Manifestos and the following sources at

Essays in the Philosophy of Humanism, 1992- 

The Humanist - A Quarterly of Ideas and Aktion, 1941-

Additionally  here some of the most important  sources related to Southeast Europe with special focus on  Bulgaria, Romania  and the West Balkans.

Special thanks goes to the CEEOL.com