For the files named as your example, use this in the Prefereces>Adding Books
Code:
^(?P<author>((?!\s-\s).)+)\s-\s(?:(?:\[\s*)?(?P<series>.+)\s(?P<series_index>[\d\.]+)(?:\s*\])?\s-\s)?(?P<title>[^(]+)(?:\(.*\))?
That will import the books, keeping the Series and Series number as well.
(It's one I got from another thread on here - Thanks to orig poster)