Books like Graham Greene: The Enemy Within

I knew Greene was a bit of a kook going into this book but man...I think maybe I shouldn't have read this book. The author tries to make suppositions about what he was actually thinking and what his motivations were while he was involved in subversive work for everyone from Noriega to Pol Pot to Papa Doc Duvalier. Greene's loyalty shifting like blowing sand - assuming he had any loyalties besides his dick and his money. My summation of the guy is he's just a right pervert rat bastard and someone should have capped his ass. I do love his stories though. And actually the author of this biography says that at the end...the work stands on its own despite the personal peccadilloes and lascivious and often treasonous desires of this creep...and yes I'm still going to read Brighton Rock.