ios – How you can sharing information between two viewControllers programmatically

I’ve an issue so i’ve tableVC (and cells)in programmatically.
class InitialTableVC: UITableViewController {

static var shared = InitialTableVC()

var bookList = [BooksModel]()


override func viewDidLoad() {
    tremendous.viewDidLoad()
    tableView.register(Cell.self, forCellReuseIdentifier: "CellIdentity")

    self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, goal: self, motion: #selector(addSomeBook))
    self.navigationItem.rightBarButtonItem?.tintColor = UIColor.blue
   
    
}


//this how i attempt to change viewController
@objc func addSomeBook() {

    let vc = BookVC()
    self.navigationController?.pushViewController(vc, animated: true)
    self.navigationController?.modalPresentationStyle = .overCurrentContext
}

// MARK: - Desk view knowledge supply


override func tableView(_ tableView: UITableView, numberOfRowsInSection part: Int) -> Int {
    // #warning Incomplete implementation, return the variety of rows
    return bookList.rely
}


override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "CellIdentity", for: indexPath) as! Cell
    
    let currentBook = bookList[indexPath.row]
    cell.bookLabel.textual content = currentBook.e-book
    cell.authorLabel.textual content = currentBook.creator
    cell.imageBook.picture = UIImage(named: currentBook.bm) ??  #imageLiteral(resourceName: "liter")
    return cell
}

}

and This my SecondVC and on this VC i am attempting to ship information from UITextFields to Labels in first VC however when i transfer to firstVC my labels dont have information

class BookVC: UIViewController {

non-public lazy var customView = BookView()


override func loadView() {
    view = customView
}



override func viewDidLoad() {
    tremendous.viewDidLoad()
    
    customView.button.addTarget(self, motion: #selector(newBookLabel), for: .touchUpInside)
    
    self.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, goal: self, motion: #selector(again))
    

}


@objc func newBookLabel() {
    let mod = BooksModel()
    mod.e-book = customView.tf.textual content ?? "error"
    mod.creator = customView.secondTf.textual content ?? "d"
    InitialTableVC.shared.bookList.append(mod)
    navigationController?.popViewController(animated: true)
}

@objc func again() {
    navigationController?.popViewController(animated: true)
}

}