Book class in Java with Enum and a HashSet

Need to create a book class with some features:name,author,price.The type of the book must be an enum and also i need to add some books using hashset.

public class Book {

    enum Type {
        Classic_Literature, THRILLER, Psychology, MANUAL, Self_Improvement;
    }
        String name;
        String author;
        double price;
       

    public Book(String name, String author, double price) {
        this.name = name;
        this.author = author;
        this.price = price;

  	  }

    public String get.name() {
   return name;

    }
}

public class Books extends Book {


    public Books(String name, String author, double price) {
        super(name, author, price);
    }

    public static void main(String[] args) {
        HashSet<String> books = new HashSet<>();
        carti.add("Baltagul");                //classical literature
        carti.add("Morometii");               //classical literature
        carti.add("Dezvoltarea personalitatii");
        carti.add("Criminalul ABC");
        carti.add("In mintea ta");
        carti.add("Abecedar");
        carti.add("Assassin's Creed Revelations");
        carti.add("In mintea lui");
        carti.add("Culegere Mate");
        carti.add("Public Speaking");
    }
}

The books are in Romanian so don't mind them.

My problem is:
-How can I make a link so that I can print out all books from "Literatura clasica"(Classical Literature)?

I don't exactly know how to implement such a method.

Some ideas to start improving your code.....

public class Book {

    enum Type {
        Classic_Literature, THRILLER, Psychology, MANUAL, Self_Improvement;
    }

    String name;
    String author;
    double price;
    Type type;

    public Book(String name) {
        this.name = name;
    }

    public Book(String name, Type type) {
        this.name = name;
        this.type = type;
    }

    public String getName() {
        return name;
    }
}   

    public static void main(String[] args) {
        HashSet<Book> books = new HashSet<>();
        books.add(new Book("Baltagul", Book.Type.Classic_Literature));                //classical literature
        books.add(new Book("Morometii", Book.Type.Classic_Literature));               //classical literature
        books.add(new Book("Dezvoltarea personalitatii"));
        books.add(new Book("Criminalul ABC"));
        books.add(new Book("In mintea ta"));

        //here you retrieve the classical literature books

        Set<Book> classicBooks = books.stream()
                .filter(b -> b.type == Book.Type.Classic_Literature)
                .collect(Collectors.toSet());
    }

There are some misconceptions on the code.
<br>

1. Have the item as book and not use it within main.
   <br>So why was defined ?
   Maybe this is required:
   <br>//colection of books
   <br> HashSet<Book> books = new HashSet<>();
   <br>2. Why Books should extends Book ?
   No need here.<br> Books is just a regular class where you do aggregation via HashSet
   <br>3.Basic Book instantiation.
   Maybe it's needed:
   <br> books.put(new Book("Poezii", "Eminescu", 123))
   <br>.4.Where is the classification of book linked ?
   <br>Maybe altering the constructor:
   <br>public Book(String name, String author, double price, BookType bookType)<br> and after do a proper instantiation
   <br>.5. Display the books within a classification.<br> Just use a regular loop within collection and validate only for a certain BookType (eg: Classic_Literature)
   ...