Short description of Merge Workbooks 2.0: Quickly and easily combine Excel workbooks. Merge Workbooks is an Excel tool for combining multiple Excel workbooks into one workbook. Simply select the workbooks you want to merge and Merge Workbooks will combine those workbooks into one workbook. The trial version is fully functional and is capable of merging up to 5 workbooks. You can remove the 5 workbook limitation by purchasing a serial number.