through the looking glass is a children fiction but how does it capture adult attention?
Through the Looking-Glass, and What Alice Found There is a children's book, but its themes and settings -- a mirror image of Alice in Wonderland which is based on a chess game -- appeal to the thought processes of adults.
Because the story is based on a game of chess, it would actually require an adult mindset to fully comprehend the references to each character as a chess piece. For example, the Red Queen is breathtakingly fast, representing the agility and relative freedom of movement of queen as a chess piece. Likewise, other characters move in a (somewhat) corresponding manner as the chess pieces they represent.
The chess theme also lends itself to political implications, with Alice being used as a pawn in the giant game. Adults understand this concept, but children typically do not.