As you realize the author is not discovering a new truth, but has a talent for presenting the concepts in a clear and concise manner. Since we all seem to have a different state of consciousness, thank goodness for the variety of writing styles so if one book doesn't help us to the next level of unfoldment, another one might.
We're so fortunate to have so much available to us. The challange is having the determination to spend the time and effort to discover what is true for us.