The book that existed at the time of this particular writing would only have been what has come to be known as the book of Revelations and not the entire Bible, as we now know it.
However, Catholics read the inspired word of God as revealed by human authors with human experiences and human languages, we should be careful in our exegesis.
The Catechetical theme this year is “God’s Word” and let me tell you that it has been especially challenging for me in my Rel.Ed classes and in Youth Community in reading, interpreting, and understanding some of the chapters and verses that we have studied so far.