seeking advice on how to research adware/spyware/identity theft software

[nix1209 () yahoo com]

I am a student interested in pursuing research on adware/spyware/identity theft software (trojans/worms/virus in the 
future). Kindly guide me as to how I can do so without compromising the security of my own computing resources. 
What layers of defence should I have on my system, so that I can capture the infection without getting infected. 
Moreover, can u suggest any books/tutorials/websites that would help me(as a beginner). 
Thank You in advance for your time.