This book precisely answers some of the most pertinent questions regarding the Orthodox understanding of Prelest (or Spiritual Deception/Delusion) which I have encountered in my Pilgrimage towards the Truth. Would also recommend a reading of Fr. Seraphim Rose Lecture on God's Revelation to the Human Heart.

I totally recommend this book for Roman Catholics.

I believe we can all feel it inside us? What is? Where do we believe it to be leading us? To awaken in the world and accept death? Is Christ your savior and did he establish his church? Thought provoking book worth the read if these are questions you have.