What is the virtual proxy design pattern?

#include <iostream>
using namespace std;
// Abstract class:
class Book{
public:
    virtual string getName() = 0;
    virtual string getAuthor() = 0;
    virtual bool isAvailable() = 0;
    virtual void showInfo() = 0;
};
// Original complete class:
class OriginalBook: public Book{
private:
    string name, author, description;
    int rating;
    bool available;
public:
    OriginalBook(string n, string a, string d, int r, bool available){
        name = n;
        author = a;
        description = d;
        rating = r;
        this->available = available;
    }
    string getName(){
        return name;
    }
    string getAuthor(){
        return author;
    }
    string getDescription(){
        return description;
    }
    int getRating(){
        return rating;
    }
    bool isAvailable(){
        return available;
    }
    void showInfo(){
        cout << "..:: COMPLETE BOOK ::.."
        << "\nName: " << name
        << "\nAuthor: " << author
        << "\nDescription: " << description
        << "\nRating: " << rating
        << "\nAvailable: " << available << endl << endl;
    }
};
// Light version of OriginalBook:
class ProxyBook: public Book{
private:
    string name, author;
    bool available;
public:
    ProxyBook(string n, string a, bool available){
        name = n;
        author = a;
        this->available = available;
    }
    string getName(){
        return name;
    }
    string getAuthor(){
        return author;
    }
    bool isAvailable(){
        return available;
    }
    void showInfo(){
        cout << "..:: PROXY BOOK ::.."
        << "\nName: " << name
        << "\nAuthor: " << author
        << "\nAvailable: " << available << endl << endl;
    }
    OriginalBook* click(){
        // Setting some default values
        // which will be fetched from a database
        // in an actual implementation:
        string description = "A bestselling novel";
        int rating = 3;
        
        // Creating the OriginalBook object
        // and returning it:
        return new OriginalBook(getName(), getAuthor(), description, rating, isAvailable());
    }
};
int main(){
    // Creating a ProxyBook
    // and showing its info:
    Book* book = new ProxyBook("Ice and Fire", "Elia Martell", true);
    book->showInfo();
    
    // Requesting the complete object
    // and showing the info:
    book = ((ProxyBook*)book)->click();
    book->showInfo();
    
    return 0;
}