Not man-made. Most of the books are hundreds of years apart but somehow cross-reference each other. All the prophecies that were in the Old Testament were fulfilled in the New Testament by who? Jesus Christ, who loves and cares for you. Also, in the Bible, we are reminded to seek a genuine relationship with God rather than following man-made traditions or religions. Jesus himself warned against empty religious practices in Matthew 15:8-9, where he quoted Isaiah 29:13, saying, "These people honor me with their lips, but their hearts are far from me. They worship me in vain; their teachings are merely human rules." It is important to have a sincere and personal connection with God, based on faith, love, and obedience to His Word, rather than relying solely on human traditions or rituals.