Thomas Farrar on New Testament Satanology and Demonology

I recently came across a Website from a former Christadelphian, Thomas Farrar, and his papers on New Testament teachings on "Satan" and "demons," refuting the arguments of Jonathan Burke ("Fortigurn" on certain LDS discussion groups); Duncan Heaster and other Christadelphian authors who deny the ontological existence of Satan. His papers on this issue can be found here.