Edward Butler has done us a service on his blog Henadology in providing short, well referenced essays on a number of Egyptian Gods and Goddesses. The essays provide a great way to start jumping into the deep and rich waters of Egyptian Theology. Here is a link to just one topic to give an idea of what the pieces are like, this one on the Ogdoad of Hermopolis (among other places):

https://henadology.wordpress.com/theology/netjeru/hermopolitan-ogdoad/

And here is a link to the entire set of topics:

https://henadology.wordpress.com/theology/netjeru/

Enjoy!