Miguel, I wouldn't be as cut a dried on that. There are few books where the authors world-view is exactly as mine. I think the key is to recognize where we agree and where we differ, so I can recognize where we disagree, but also learn where we agree. Iron does sharpen iron and when you recognize fallacies in their thinking because of their world-view, that makes you think harder on how you would re-write that section based upon your understanding. Many books are written to answer perceived errors in other authors thoughts. I hope this helps. thanks, Orrin