Who revealed the Qur'an?

Quran is the Holly Book which revealed to Prophet Muhammad (PBUH).Literally meaning of Quran "A reading or reciting”. However, the "Quran" has been historically used specifically to refer to the book which was revealed to Prophet Muhammad (PBUH).Quran is a literary masterpiece which the world has seen, nothing can be compared to the Holy Quran millions have become Muslims upon simply hearing a verse from this amazing book, yet still the majority of humanity don't know much about it.