Halo: Rebirth is an epilogue to the book Halo: Silentium, written by Greg Bear and his daughter Chloe Bear. Originally, Rebirth was released via Halo Waypoint and could be acquired as an 45-minute audio narration by entering the code found at the beginning of each chapter of Silentium. The text was integrally added to later releases of Silentium. In 2022, 343 Industries released a free PDF download of Rebirth to make sure doesn’t remain in obscurity.