Bayesian Statistics

I have been reading in Kindle the recent book on Bayes' theory about how to figure statistics:  The Theory That Would Not Die: How Bayes' Rule Cracked the Enigma Code, Hunted Down Russian Submarines, and Emerged Triumphant from Two Centuries of Controversy
The author is Sharon Bertsch McGrayne.  

Here's the Amazon.com link.

This book is hugely interesting as an intellectual history.  Much of the work using these statistics is classified, and substantial parts are missing.

I never really understood what Bayesian meant before.