For a link like this:
books with ISBN 9789881897251
Copy this URL:
https://www.bookfinder.com/search/?isbn=9789881897251&st=xl&ac=qr
Copy this HTML:
<a href="https://www.bookfinder.com/search/?isbn=9789881897251&st=xl&ac=qr">books with ISBN 9789881897251</a>