This book breaks the entire concept of figuring out what God's purpose for you is in life and how to realize that objective into 42 short, clear, one-per-day chapters, each with 3 key points to think about as you work through it. From a Christianity standpoint, I don't think there's anything in it that the overwhelming majority of Christians would find controversial. I'm working through it solo, but as the book recommends, I think it's a more effective exercise if done with another person/people for discussion.