Well, from what I know, it could be about the heroes and villains in the Neverwinter Nights 2 world. It might explore the backstories of the characters we see in the game. For example, it could detail how a particular hero came to possess their special powers or how a villain became so evil. It may also include epic quests that the characters embark on, like saving the city of Neverwinter from some great threat, whether it be a horde of demons or a power - hungry wizard.
I'm not entirely sure as I haven't read it in full. But generally, it might be based on the 'Neverwinter Nights 2' game world, perhaps following the adventures of characters in that rich fantasy setting, dealing with magic, battles, and political intrigue within the game's universe.
The 'Neverwinter Nights 2 Novel' could be centered around the complex relationships in the game world. It might show how different races, such as humans, elves, and dwarves, interact with each other. There could be stories of love and betrayal among them. Maybe it delves into the political landscape of Neverwinter, with different factions vying for power. It could also describe the various magical elements in great detail, like the spells that are cast and the magical artifacts that are sought after by the characters.