Question: What if the Quran you recommend in the sidebar is somehow biased or not authentic?
Answer: This is surprisingly easy to find out for yourself. I had the same concern when I bought my first copy of A Simple Koran. So I checked it against my other Quran. I had already tried reading a standard-issue Quran I bought at my local bookstore.
So I checked verse against verse until I was satisfied it was authentic. Each chapter and verse of the Quran is numbered, so it is easy to cross-check like this.
You can do it online as well. Lots of web sites have the entire Quran available to read online. Here are a few: A Chronological Qur'an, IslamiCity, USC, NobleQuran, The Koran, The Holy Quran, The Quran, Pickthall's Quran, Yusuf Ali Quran, Rodwell's Koran, Quran, Skeptics Annotated Quran.