In the 'Attack on Titan' series, there is no clearly defined canon romantic interest for Levi. His character is mainly focused on his role as a soldier and his fight against the Titans. However, many fans like to ship him with various characters in fan - made love stories.
I'm not familiar with the author of this novel. There are so many novels out there that it's hard to keep track of all the authors. You could ask at a local bookstore or check some literary databases.
Well, without having read 'the zone of interest novel', it could potentially be about a psychological zone of interest. Maybe it explores the minds of the characters and what they find interesting, whether it's a pursuit, a relationship, or an idea. It could also be about a physical zone that has some sort of significance, like a restricted area or a place full of mystery.
I'm not entirely sure as it's not a very common term. It could potentially be a novel that focuses on a particular zone of interest, like a specific geographical area, a certain time period in history, or a unique concept that the author wants to explore.
The Zone of Interest is purely fictional. The plot and characters were crafted to tell a unique and engaging tale, not drawn from real-life events. The author likely wanted to explore certain themes and concepts through this fictional setting.