C.S. Lewis famously wrote: "I am not asking anyone to accept Christianity if his best reasoning tells him that the weight of evidence is against it" Yet, reading what follows in the pages of his classic of apologetics, Mere Christianity, one may question whether it was Lewis's best reasoning that led him to accept it and to continue defending it. Rather, I suspect he was, as all apologists are by the nature of their task, mounting the best case he could for a position embraced on other grounds. One may recall his conversion account provided in his autobiography, Surprised by Joy. A childhood experience of seeing a flowering currant bush had triggered a world-transforming moment of mystical transcendence which sounds rather like a Zen experience. Years later his Christian conversion turned on what sounds like another moment of Satori: Lewis converted while riding to a zoo in his brother's motorcycle side car. "When we set out I did not believe that Jesus is the Son of God and when we reached the zoo I did." I somehow doubt such an experience arises rationally or that it can be defended, even understood, that way. And in this little book I want to explain why I no longer find that cardinal Christian claims make enough sense to believe. Book jacket.