I need some help trying to figure out how would i add the current element from the old list to the current element in the new list

```
public List<Book> filterBooks(List<Book> readingList, String author)
{
    for(int i = 0; i < readingList.size();i ++)
    {
        List<Book> myList = new ArrayList<Book>();

        if (readingList.get(i).getAuthor().equals(author))
        {
            //how would i add the current element from the old list to the current element in the new list
         }
        readingList = myList;
    }
            return readingList;
}

```