The Quran is the revelation from God through the angel Gabriel to the Prophet Muhammad. The whole of the Quran was memorized by the Prophet Muhammad and many of his companions, and it was written down as a book. It is a revealed book like the Torah and Bible. The Hadith is a collection of sayings and practices of the Prophet Mohammad to apply the teachings and laws given in the Quran. The Hadith was meticulously collected and authenticated by the scholars of Islam.
Islam is so violently attacked in the press and the media, and misinformation about Islam abounds to the extent that ignorance about Islam is widespread. The United Nations rightly forbids criticism on Islam because it is not genuine criticism but malicious fabrication. This does not help world peace. All religions teach peace, and we must strive to understand truth about religions.
Islam's teaching is very much the teaching of the Torah and the Bible for the worship of one God. Islam, like Judaism and Christianity, is an Abrahamic religion. Islam recognizes Moses and Jesus as prophets along with many other prophets mentioned in the Torah and the Bible.
Those who are interested in Islam can read the books Islam: The Straight Path, by Prof. John L. Esposito, and A History of God: The 4,000-Year Quest of Judaism, Christianity and Islam, by Karen Armstrong.
I. A. Jilani