Combining PDF files

In Acrobat X Pro or Standard, click where it says Create (top left of screen) and choose "Combine files in to single PDF" (or file – Create – Combine...)you can then add the files by choosing them or choosing "add open file", you can change the order and file size options in there to.
Hope this helps?

Yes, with Acrobat but not the free Adobe Reader.

Adobe does offer PDF Conversion online for a price if one has Adobe Reader.

Here is a quick tip tutorial that explains how to combine files into a single PDF using Acrobat X Std. or Pro.