Definitely. The volume 12 audiobook continues the epic story of Overlord. It has all the elements that make the series great, like the complex world - building, interesting characters, and intense plot twists. Listening to it can be a great experience, especially if you don't have time to sit down and read the novel. The audiobook allows you to enjoy the story while doing other things, like commuting or doing household chores.
The light novel that serves as the basis for Overlord Season 4 is the ongoing series by Kugane Maruyama. It has a rich and complex storyline that the anime adaptation tries to capture faithfully.
I'm not entirely sure which new characters are introduced specifically in volume 9. But generally, in the Overlord series, characters like Ainz Ooal Gown remain extremely important. His actions and decisions drive most of the story. The floor guardians such as Albedo also continue to be significant as they carry out Ainz's orders and protect Nazarick. There may be some minor characters from the human kingdoms or other races that are introduced to show the different perspectives in the world.
In Overlord volume 9, a key plot point is Ainz's attempts to expand his influence. He uses different strategies to assert his dominance. There are battles against powerful foes that test the strength of Nazarick. The volume also delves into the backstories of some of the minor characters, which gives more depth to the overall narrative. For instance, we might learn about the history of a certain village that now falls under Ainz's rule. Additionally, the power dynamics between the different floors of Nazarick are further explored, with some guardians vying for more important roles in Ainz's grand plan.
I don't have the exact answer for that. It could be related to a specific manga series, but you might have to do some research on manga databases or ask in manga enthusiast communities to get a definite answer.
The ending of Overlord Season 4 in the light novel is tied to a major event. But to give you the precise location, I'd need to refer back to the books. It's a complex and engaging part of the story, though.
Overlord Season 3 ends at a specific point in the light novel, but it varies depending on the translation and edition. You might need to check the specific volume and chapter details.