The "Qur'an" is the final divine message revealed to humankind through the Prophet Muhammad, peace and blessings be upon him. With additional information taken from extensive sources of Islamic jurisprudence and history, Ali ijnal's translation provides extensive explanations of the divine message.
NOTE: The rating is for this translation and the annotations, not the Qur'an itself. I think it's a good habit for an agnostic to give ratings to religious texts. (Except Ecclesiastes, which I give 10/10 would recommend.)