Although I have not read the book, it’s encouraging to see the popularity of a book about Our Lady of Guadalupe. You can read our own article on this website on the apparition and the miraculous image here.
CNA reports: The book is authored by Carl Anderson, Supreme Knight of the Knights of Columbus, and Guadalupe expert Msgr. Eduardo Chávez. It traces her history as a religious and cultural symbol from the sixteenth century to the present. Read more here.