Does the Book of Acts Accurately Portray the Life and Teachings of Paul?

A fundamental question has recently come to me, which involves one of the central issues in the study of the life and teachings of Paul.  As most members of the blog may know, there are thirteen books in the NT that claim to be written by Paul, six of which are widely thought not actually to be by him.  But that means, on the positive side, that we almost certainly have seven letters actually written by Paul, so that if we want to know about him, we can turn to his own writings (unlike, for e...