This is an excellent defense of the Catholic teachings regarding Mary. Due to his religious upbringing, Staples if able to accurately address Protestant oppositions in a way that a cradle Catholic could not. He draws from a number of sources, especially Scripture and the early Church. Staples addresses a wide array of topics ranging from oppositions to Mary, confusion about Catholic beliefs surrounding her, and why a devotion is an important part of Christian life.
One of the pleasant surprises in the book was a clear response regarding Catholic beliefs around salvation. Though Salvation by Jimmy Akin does a phenomenal job addressing this topic, the short section in this book was also really helpful. My one criticism is that he repeats some Bible verses several times throughout the book. Though they are relevant to each question he includes them in, it does become a little repetitive.
Despite that, I highly recommend that every Christian, especially Protestants who question Catholic devotion to Mary, take the time to read this booklet.