The 'the beginning after the end novel book' is about a person who finds himself in a different kind of existence. It's not just about his personal journey though. It also delves into the politics and power dynamics of the world he's in. There are elements of mystery as he uncovers secrets about the world and his own past. The relationships he forms, be it with his family in this new life or his new friends, are central to the story. It has a great blend of action, when he battles against various threats, and more emotional, introspective moments as he tries to figure out who he really is now.
The Beginning After the End manga has indeed finished. It provided a satisfying conclusion to the characters' arcs and the overall narrative. Maybe there'll be spin-offs or related projects in the future, but for now, the main story is complete.