"Who are these terrorists who slaughter in the name of Islam?"
"What are they trying to achieve?"
So, the question is "What is the difference between this religion, Islam, and all the others?" The majors -- Judaism, Hinduism, Christianity, Buddhism, and of course, Islam.
This very question is covered in the book, but the short version is simply this: Islam has over-zealous leaders who teach that they have a scared mission, "by force of persuasion" to bring the whole world under their dominion. And then the book explains "why."
It's necessary to explore the Teachings and Beliefs of these major religions.
So, the book asks the same questions of each religion. What does each religion teach, and what do they believe,
as to a Creator? Is there a God?
the origin of the universe, our planet Earth?
the origin of evil and suffering?
about reconciling with God?
Finally, what does each religion teach as to their role, their purpose?
The book is easy to understand, to the point.
The better news is that you don't have to read the whole library to understand the differences among the religions.
Yes, the book briefly touches on the other isms.
That is to say, Humanism, Narcissism, Agnosticism, Monism (New Age), Atheism, and the like. But, the main focus is on the major religions.