I believe this to be the right forum for this, but I purchased a book for myself as a birthday gift about cockroaches. I love this book.
http://www.amazon.com/Cockroaches-Ecology-Behavior-Natural-History/dp/0801886163/
It's expensive, but worth it. It's not picture heavy, but it is loaded with information. It's directed towards the scientific community to help others either gain an appreciation for cockroaches, or learn more about the insects they love. There's a lot of terms in there I have had to google, but I was more than happy to do it!
I wanted to share this because I'm impressed with it, and I can't wait finish it.
Are there any other books out there that are recommended reads? I've already got the Allpetroaches book!