Model a JSON REST API

Goal: Practice modeling nested JSON structures and creating REST endpoints.

The JSON Structure

You are given this JSON response from a public books API:

{
  "id": 1,
  "title": "Effective Java",
  "isbn": "978-0-13-468599-1",
  "publishedYear": 2018,
  "edition": 3,
  "author": {
    "id": 101,
    "name": "Joshua Bloch",
    "birthYear": 1961,
    "nationality": "American"
  },
  "publisher": {
    "name": "Addison-Wesley",
    "country": "USA",
    "founded": 1942
  }
}

Your Task

Create a Spring Boot REST API that mimics this structure (in-memory, no persistence).

Requirements:

1. Create the model classes: Book, Author, and Publisher
2. Create a BookController with these endpoints:
   • GET /api/books - Returns a list of at least 3 books
   • GET /api/books/{id} - Returns a single book or 404 if not found
3. Use hardcoded data in your controller
4. Test your endpoints using browser/Postman

Hints:

• Use @RestController and @RequestMapping("/api/books") on your controller class
• Use @GetMapping for GET endpoints
• Use ResponseEntity.notFound().build() for 404 responses
• Store books in a List<Book> in your controller