Regarding philosophy:

Do you have any specific research interests?

Generally speaking, the Stanford Encyclopedia is the best online source of information about philosophy. I would recommend reading the following article:

http://plato.stanford.edu/entries/logical-empiricism/

Here are the titles of what are considered to be the most influential works of the 20th century:

http://commonsenseatheism.com/wp-content/uploads/2011/02/Lackey-What-are-the-modern-classics.pdf