Although (as a protestant believer) I do not accept the authority of the Roman Church, I found Mr. England's work emminently readable and helpful.
My only real concern is that it is not radical enough. Jesus taught us to turn the other cheek; modern libertarianism teaches us to not be the first to strike, aka non-agression. There is a significant gulf between the two which Mr. England does not cross adequately.
Regardless of that concern, Mr. England is plowing very fertile ground, and deserves wide readership. I therfore heartily recommend it to believers of any persuasion seeking truth with an open mind.