replace name parts

I have a file with about 2000 e-books.
Content now is: booktitle – firstname lastname.epub
Examples:
the first time – miquel bulness.epub
black box – anna woltz.epub

Question: how do i get the following output:
the first name – bulness, miquel.epub
black box – woltz, anna.epub

Can you give me a helping hand?

Thanks in advance,
Rien

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Reply to #1:
Is this a double post?

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