private void insertNewBookToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Hide();
            var bookInsertForm = new BookAddForm();

            bookInsertForm.Show();
        }
        private void addNewBookToolStripMenuItem_Click(object sender, EventArgs e)
        {
            var bookInsertForm = new BookAddForm("home");

            this.Hide();
            bookInsertForm.Show();
        }