Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Explain a book in less than 3 sentences.

### Input:
The Catcher in the Rye by J.D. Salinger

### Response:
The Catcher in the Rye is a 1951 novel by J.D. Salinger. It follows protagonist Holden Caulfield as he struggles with feelings of alienation and loss of innocence. The novel has become a classic of post-World War II literature and has been cited as an influence on subsequent generations of writers.