As Muslims, we strongly condemn the terrorist attacks on two major cities of the United States of America on September 11, 2001, which caused the death and injury of thousands of innocent people. This book maintains that the source of the terror that we condemn is definitely not from a divine religion, and that there is no room for terrorism in Islam. This is made clear in the Qur'an, the main source of Islam, and in the practices of all true Muslim rulers, the Prophet Muhammad (saas) being the foremost of them. We need to keep in mind that, among those who were killed in New York and Washington, there were people who loved the Prophet Jesus (as) (Christians), the Prophet Moses (as) (Jews) and the Prophet Muhammad (saas) (Muslims). Unless forgiven by Allah, murdering innocent people is a great sin that leads to torment in Hell. No one who is religious and fears Allah would do such a thing. Religion commands love, mercy and peace. Terror, on the other hand, is cruel, merciless and demands bloodshed and misery. This being the case, the origins of terrorist acts should be sought in disbelief rather than in religion. The name or the identity of the triggerman is not important. If he can kill innocent people without blinking an eye, then he is a nonbeliever, not a believer. For this reason, "Islamic terror," "Christian terror" or "Jewish terror" are all erroneous concepts which contradict the message of divine religions. True religion can by no means countenance terrorism. On the contrary, terror (i.e. the murder of innocent people) in Islam is a great sin, and Muslims are responsible for preventing these acts and bringing peace and justice to the world. This book reveals, in the light of the verses of the Qur'an and with examples from history, that Islam forbids terrorism and aims to bring peace and security to the world.