//Open the first excel file. Workbook SourceBook1 = new Workbook("F:\\Downloads\\charts.xlsx"); //Define the second source book. //Open the second excel file. Workbook SourceBook2 = new Workbook("F:\\Downloads\\picture.xlsx"); //Combining the two workbooks SourceBook1.combine(SourceBook2); //Save the target book file. SourceBook1.save("F:\\Downloads\\combined.xlsx");