I read this book 4 times, and each time, I was blown away... A spiritual treasure. I call it my Bible. It absolutely quenched my thirst of answers. Though, I must admit, it can be hard to understand, even if Sri Nisargadatta Maharaj is the most blunt, simple, straightforward person. You shouldn't read it if you are a beginner on the spiritual path. Try some other books like A New Earth (Eckhart Tolle), The Power of Now (Eckhart Tolle), The Untethered Soul (Michael Singer) before you get to I Am That, if you want to benefit from it as much as possible.