Other reviewers have given this book 1 star because they believe you need only read information put out by the LDS organization to understand their beliefs, which they seem to imply is the only purpose of this book. I disagree. One purpose of this book is for the reader to understand LDS beliefs as they contrast with orthodox Christian beliefs (those held by people who believe that the Bible is the only inerrant, authoritative, infallible, inspired Word of God in existence). The author goes through the LDS beliefs and contrasts them to orthodox Christian beliefs and points out the differences and how many LDS beliefs actually mirror non-Judeo-Christian belief systems (ancient Egyptian, Greek, etc.).
A reader could very well go to the LDS website to gain knowledge of LDS teachings and then go to the website of an orthodox Christian denomination to gain knowledge of theirs, then compare them on their own. But this book already provides much of that same information. After reading this book, one might still want to go to the LDS site to double check if what the author states as LDS doctrine is indeed the official LDS doctrine taught to their members, or, better yet, ask an LDS friend, neighbor or family member yourself what they believe.