Is Quran actually the final Word of God and is Muhammed really a prophet?

Allah sent many messengers and prophets, with [b]four main scriptures[/b]:
[b]From Adam to Muhammed[/b], the holy books were Zaboor(now a part of bible), Torah(old testemon), Injeel(original bible) , and the final book Holy Quran.

Now many, in this world dont consider Muhammed as the final prophet and Quran as the final book of guidance. They deny both the last prophet and the last holy book.

The [b]main reason[/b] to that is, it contradicts there scriptures, (edited ones), and we as Muslims believe all the previous prophets and messengers, were sent by God and these all, the scriptures were divine.

So I have a [b]question[/b] from whoever is reading this.
Do you read the oldest edition of a book, or the newest one?

All the previous books got corrupt, and satan misguided man, and made all the made up stories look real. Now Allah sent his final book, the Holy Quran with Muhammed ( He was the best man ever on earth, and the reason to why god made humans prophets is so that we understand how to become best of human beings by seeing then all, peace be upon them all)