Black Wings: The Rebellion Begins by Dalton A. Carmon, is a book about Death. More specifically, it tells the story, of the Angel who becomes Death; that is, the "Angel of Death."
The story begins with a chronicler, The LegendNomad, taking down the stories of the various characters in Valhalla, as they come to sit across from him at a desk. Soon, a character with one eyepatch comes to sit across from him, and begins to tell him his story.
As it turns out, his story is about the Nameless - An Angel who resides in heaven, but has no name, and no duties. The Angel spends his days communing with his fellow Angels and Archangels, exercising, exploring the city of Angels, going on trips to the real world, and just generally keeping himself busy while he awaits the day when his name and job will finally be bestowed upon him.
Like all Angels, Nameless reveres the Celestial Titan who created all things, and who gives each and every creation a name and a purpose. While Nameless is anxious about the fact that he remains the only Angel with neither of those things, he continues to place his utmost trust in the Titan and wait patiently.
Then one day... calamity strikes. Someone destroys the statue made to honour the Celestial Titan in the city of Angels. Nobody knows who... but there could only be one reason why. Now the Seraphim (the highest ranking Angels in heaven) have come to investigate. As trouble sets in, and the Angels come under suspicion, the stage is finally set for the Nameless to discover his name, his purpose, and why it's taken so long to get to him.