Who is God? Who created him? Where did he come from? Do we believe he is afraid? His existence has been repeatedly questioned. But why? One myth after another has developed around him all over the world. His nature is different in religion, his character is different. But the arguments of theism and atheism about him exist equally everywhere. Prof. Samir Mukherjee has tried to analyze these issues with logic in his 'Iswar ...?'(Bengali Edition) In the book.