Why I am Not a Muslim by Ibn Warraq
Those who practice the Muslim faith have resisted examinations of their religion. They are extremely guarded about their religion, and what they consider blasphemous acts by sceptical Muslims and non-Muslims alike has only served to pique the world's curiosity. This critical examination reveals an unflattering picture of the faith and its practitioners. Nevertheless, it is the truth, something that has either been deliberately concealed by modern scholars or buried in obscure journals accessible only to a select few.