One of the main themes is justice. Moriarty's actions, while often extreme, are driven by his own sense of a warped justice against the class - based inequalities in society. Another theme is intelligence and manipulation. Moriarty uses his high - level intelligence to manipulate various situations and people to achieve his goals.
Sherlock Holmes is an interesting character in the context of this light novel. His interactions with Moriarty, their intellectual battles, are really captivating. He represents the traditional sense of justice and order, which is in direct contrast to Moriarty's more radical approach to changing society.
I really like 'A Different Path'. This fanfic takes a unique turn by changing some of the events in the original story. It shows an alternate version of Moriarty's plan and how it affects the other characters. The writing style is engaging, and it keeps you hooked from start to finish.