Honestly, it was hard for me to read this book. Even as an avid reader, it was hard to stick with it; however, it wasn't hard for the reasons readers might assume. Some might jump to assume that it wasn't well-researched, or well-written, or both. Some might even assume that it wasn't catchy enough to compete with our social media saturated culture.
Poll after poll demonstrates that the number of religious people in America is declining--even Bill O'Reilly now admits it. But counting the corresponding increase of those without traditional religion continues to be a mix of moving targets and differing definitions. This is because people are often counting different groups.