I want to recommend a key book in understanding the Qur’an (or Koran, the Islamic Holy Book):
Robert Spencer’s The Critical Qur’an: Explained from Key Islamic Commentaries and Contemporary Historical Research.
As of my writing this, it is #1 Best Seller in Quran for Amazon. A Christian expert in Islam said this book will really help people see how destructive the Koran is and Islamic core teachings. And thus why this is the best time in the world for a Muslim to read the Bible and turn to Christ!