I can't always find the books I'm looking for, but these websites offer the electronic version. They are so vast! Does anybody else have other websites to share?
http://www.ccel.org/fathers.html
There's a mix of Orthodox writing and some ambiguous. But, it's interesting to go through.
http://www.earlychristianwritings.com/
Apparently this website holds the only English translation on-line for the works presented here. I don't know how accurate they are. Some are translations from Armenian, so of course there will be bias.
http://www.tertullian.org/fathers/
They have an extensive Patristic list from A-Z