You should read Feet of Clay by Anthony Storr. It's for "thinking men".
"Religious faith is an answer to the problem of life....The majority of mankind want or need some all-embracing belief system which purports to provide an answer to life's mysteries, and are not necessarilly dismayed by the discovery that their belief system, which they proclaim as "the truth", is incompatible with the beliefs of other people. One man's faith is another man's delusion.....
Whether a belief is considered to be a delusion or not depends partly upon the intensity with which it is defended, and partly the number of people subscribing to it."
Anthony Storr,
Feet of Clay