Just as the Prophets Moses, Jesus and David (peace be upon them) were given books of revelation (The Old and New Testaments and Psalms respectively; all of which Muslims acknowledge) so too was the Prophet Muhammad (peace be upon him). The message brought by the Prophet Muhammad (peace be upon him) was consolidated through successive revelations collectively known as the Quran. The Quran contains guidance for the whole of humankind and exists in exactly the same form today as it did when it was revealed over 1400 years ago.
Allah says: "This (Quran) is enlightenment for mankind and guidance and mercy for a people who are certain (in faith)." [Quran 45:20]
You can read the English translation of the Quran at: www.quran.com
***If you have any questions about Islam feel free to contact us via our facebook page, copy the link or click the "facebook" button below: www.facebook.com/MalcolmXPage