Hello machirajun,
Welcome to the Monastery. It was a few days ago a recent question was asked and I wrote a script for it. Take a look here Re: Merging 2 xlsx files (UPDATED), maybe this shouts your needs, since is able to handle multiple sheets and multiple documents.
Hope this helps, BR.
In reply to Re: Merging worksheets in .xls in one Excel sheet
by thanos1983
in thread Merging worksheets in .xls in one Excel sheet
by machirajun
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