The Shadows of War Nazgul stories are mainly about the dark and menacing Nazgul in the game's lore. They are powerful servants of Sauron, and the stories might cover their origin, their powers, and their role in the war.
I'm not entirely sure which specific 'Nasguo' stories are in 'Shadows of War'. It could be that it's a very specific or perhaps even a misspelled or fan - created part. Maybe it refers to some side quests or character - specific tales within the game that are not widely known under this name.
The Nazgul were once men. They were corrupted by the power of the Rings of Power given to them by Sauron. These men, kings, sorcerers, and warriors in their former lives, became his most feared servants. Their back stories involve their initial allure to the power of the rings and their gradual descent into darkness under Sauron's influence, losing their humanity bit by bit until they became wraith - like beings, bound to Sauron's will.
One of the most important aspects is their fall from grace. They were once men of some standing, but through their greed for power via the Rings of Power, they became slaves to Sauron. Another aspect is the way their physical and mental states changed. Their once - human forms deteriorated into something more sinister, and their minds became completely dominated by Sauron's will.
The 'Shadows of War Novel' likely delves into the dark and complex world of war. It might be about the various characters involved in a war, their struggles, their hopes, and the moral and ethical dilemmas they face. It could also explore the different factions at war, their motives, and the power plays that occur on the battlefield.
I'm not sure specifically as I haven't read it. But generally, a novel with such a title might be about the dark or hidden aspects of war, perhaps the unseen consequences, the moral shadows that war casts on individuals or society.
Well, in a fanfiction scenario, Harry Potter might use his powerful magic like the Patronus charm. The Patronus, being a powerful positive force, could potentially drive away the Nazgul which are associated with darkness and fear.
I'm not sure exactly who the main characters are without reading the novel. But they could be soldiers, commanders, or civilians caught up in the war. Maybe there's a heroic soldier who is trying to make a difference, or a political figure who has to make tough decisions during the war.