Not able to read data from an existing file (Visual Studio 17)

I am trying to make a small menu-driven bookstore application where one is able to:

1. Add Books
2. Search for the books
3. Display all the books
4. Save the data to a .txt file

Everything was working fine until I decided to read data from any previously made file (and maybe put it to use so that the bookstore is not always empty in the beginning).

After I am done with all the operations, the objects are successfully written to a .txt file and it can also be read without any issue.

But I can't read it in the beginning (from an existing file).

Here is the class (similar to the full-fledged program) which I made.

class BookStore {
class Book {
    string BookTitle;
    int BookCost;
    int BookStock;
public:

    Book(){
    };
    ~Book() {
    };

    Book(string title, int cost, int stock) {
            BookTitle = title;
            BookCost = cost;
            BookStock = stock;
    }

    string getTitle(){
        return BookTitle;
    }

    int getCost() {
        return BookCost;
    }

    int getStock() {
        return BookStock;
    };

}; // inner class Book ended

    public:

    Book* bk[5] = { NULL };

    void SaveToFile() {

    fstream fop;
    fop.open("Catalogue.txt", ios::out | ios::binary);
    int lim = 3;
    bk[0] = new Book("book1",40,3);
    bk[1] = new Book("book2",50,3);
    bk[2] = new Book("book3",60,3);

    for (int i = 0; i < lim; i++)
        fop.write((char*)&(*(bk[i])), sizeof(Book));

    fop.close();

    }

void RetrieveFromFile() {
fstream f;
f.open("Catalogue.txt", ios::binary | ios::in);
if (f.good() == 1) {
    cout << "\n Existing file found... Reading data... \n";

    f.seekg(0);
    Book b;
    f.read((char*)&b, sizeof(Book));

    while (!f.eof())
    {
        cout << "\n ------- \n";
        cout << "Book Title : -   " << b.getTitle() << "\n";
        cout << "Book Cost : -  " << b.getCost() << "\n";
        cout << "Available Stock : -   " << b.getStock() << "\n";

        f.read((char*)&b, sizeof(Book));
    }
    f.close();
}
else
    cout << "\n Suitable Pre-existing File not found";
}

}; // end of class BookStore

There is no compile-time error. And the screen just freezes for a moment when it is trying to display data, and then shows the 'Press any key to continue...' statement.

I ran it in the debug mode and got:

Unhandled exception at 0x00007FFD118EC231 (ucrtbased.dll) in main_BookStore.exe: 0xC0000005: Access violation reading location 0x0000018B5FEFDCD0.

Here is the main()

int main() {
BookStore* bs = new BookStore();
bs->SaveToFile();
bs->RetrieveFromFile();
return 0;
}

So if I try to do

{
BookStore* bs = new BookStore();
bs->RetrieveFromFile();
return 0;
}

It doesn't go through successfully. I was expecting to see all the 3 book details.