But it is a history book. Otherwise, why does it contain so much history? Why not just philosophical musings like something from Kahlil Gibran?
Replace “It’s” with “Genesis is”.
And even the history books are not exclusively history books. They have many meanings and purposes. They are archetypes of God’s fractured relationship with man, extensible to all of us. They set the stage for Jesus’ appearance and explain the necessity of his sacrifice.