Combine/join several PDF files using Kofax Power PDF Advanced
Method
Open Kofax Power PDF Advanced*
From the Home ribbon choose Combine Files
Select Add or drag-and-drop files onto the file list. Use the Up and Down buttons or drag items to get them into the desired order
Set options as required. Combine files into one PDF document and Tagged PDF are a good basic combination. If your source PDFs contain images then use Lossless (level 100) compression to preserve quality
Click Start PDF Creation and choose where to save the output file. Processing can take several minutes so be prepared to wait