Diablo's official novel had never been officially published, but there were some novels and comics that were adapted from the game's plot and worldview. The more famous ones were Diablo: Destruction and Rebirth, Diablo: Eye of Death, and Diablo: Eye of the Demon. These novels and manga works were different from the game's world view and plot, but they could also present the game's story background and character settings well. If you want to read Diablo's official novel, it is recommended to search for relevant websites or buy legal books.