Arch Angel Book 1: Darkness returns

The Shadow Knights are on their way to the portal to free the shades. Will the Divine Knights be able to stop them? Will the Angels be there to save the day like they did when the Shades first arrive? Or will the Shades turn Earth into a living hell. The fourth legion have a say in this. They have grouped up with the fifth legion and the Angels to stop the Shadow Knights from freeing the darkest beings in the universe