Copy and paste from multiple workbooks

Good afternoon,

I have been studying VB for only a short time and have come across a challenge that is too complex for a novice. I need to develop code that would enable me to copy data from multiple worksheets each residing in separate workbooks and transfer that data to a master worksheet. The data from each worksheet/book encompasses a varied number of columns and rows. Then, I will need to paste each set of data on the master worksheet with one empty row to separate each set of data.

Thank you for any help you can offer.

RG