Explain the theme of this book.
The Catcher in the Rye
The theme of The Catcher in the Rye is of alienation and identity, captured through protagonist Holden Caulfield's cynical narration and his difficulty connecting with the world around him.
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Explain the theme of this book.

### Response:
The theme of The Catcher in the Rye is of alienation and identity, captured through protagonist Holden Caulfield's cynical narration and his difficulty connecting with the world around him.