Strider's role in the story makes him fit into the fantasy genre. He is a ranger, a protector of the wilderness, and plays a significant role in the quest to destroy the One Ring.
Therefore, if you are referring to a book featuring Strider as a main character, it would likely fall into the fantasy genre. However, without more context, it's impossible to be completely sure.
Could you please provide more information about the book you are referring to? For example:
* The full title of the book
* The author
* A brief description of the book's plot
With more information, I can give you a more accurate answer about the genre of the book.