Deleting item from SQLite deletes next item

I have wrote code to delete an item from SQLite database and from listview, it always deletes next item. For example i have 3 items to delete ("1", "2" and "3") i press delete on item "1" but it deletes item "2", i press delete item "2", it deletes "3" but if i press delete "3" application crashes. I dont understand what is wrong. when i write

db.delete(books.get(info.position-1))                                    

inside MainActivity.java it gives me crash when i try to delete (app stops working).

DBAdapter.java

public void delete(String name)throws SQLException {
    SQLiteDatabase db = helper.getWritableDatabase();
    if (db == null) {
        return;
    }
    String[] whereArgs = new String[] { name };
    db.delete("m_TB", "NAME"+ "=?", whereArgs);
    db.close();
}

MainActivity.java

public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    menu.add("Delete");
}

public boolean onContextItemSelected(MenuItem item) {
    super.onContextItemSelected(item);
    AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
    String name = info.toString();
    if (item.getTitle().equals("Delete")) {
        db.delete(books.get(info.position));
        books.remove(item);
        adapter.notifyDataSetChanged();

    }
    return true;
}