You can easily append (merge / join) multiple PDF files together using Click to Convert.

To append a PDF file to an existing PDF file:

1. Start converting the new file that you want to append to an existing PDF.
2. In the Click to Convert Publish Settings window, make sure you check the option to Prompt for PDF filename or append to existing PDF.
   
   
   
   
3. Adjust any PDF creation settings and then click the Create button.
4. Click to Convert will now ask you to select the existing PDF that you want to append the new PDF file to. 
   TIP: If you haven't created the first PDF file then do that before you create the files that you want to add.
   
   
   
   
5. Choose an existing PDF file and click Save.  Click to Convert will now append the new PDF file to the existing PDF file.