There are many holy books. Judaism accepts the Torah, the Old Testament. Other religions like Buddhism, Hinduism, Zoroastrianism and Islam all have their sacred writings.
But we’re operating from the premise here that there is only one Bible. Its purpose is to disclose to people in every culture God’s plans and purposes for time and eternity.
The vast scope of the Bible covers man’s arrival on a sin-free planet, the introduction of the fatal sin virus when Adam and Eve chose to disobey God and thus, according to the inspired writers, allowed sin and death to enter our world. The rest of the Bible is the story of God’s love for all mankind and of His ultimately successful efforts to pave the way for us to be forgiven and become the people of God that He wants us to be.