Born In Blood by John Robinson.

         John Robinson offers a different history for the Freemasons which is interesting, linking them back to the Knight Templars rather than than the craftsmen masons who built the cathedrals.  We don't have a good paper trail.   Masons started as a secret society, so the history is obscured.  Read and decide for yourself.  With time, I believe, historians will learn more about the roots of this brotherhood.  I just finished this and am now reading Rosslyn:  Guardian Of The Secrets Of The Holy Grail, by Wallace-Murphy & Hopkins.  It seems much more speculative than Robinson's book, but interesting, nonetheless.

http://www.amazon.com/Born-Blood-Lost-Secrets-Freemasonry/dp/0871316021