There are lots of ways to do this.
For what it's worth, Calibre does a fine job. The options offer lots of flexibility and you don't need much prior experience to make it work.
The Chrome browser includes a printer selection called "Save to PDF". Select print and a dialog will come up. Under your default printer, click the "Change" button. Select "Save to PDF".
Microsoft Word has a save to PDF function. You can load the web pages, edit them how you want, and save the result as PDF.
If you only want to do it once (or over the next week, anyway), then the
Acrobat free trial gives you all the tools you need. If you want it for longer, older versions offer a 30-day trial and are still available for download (
Acrobat 8 or 9 and
X or XI).
Installing
Ghostscript and
CutePDF will add a PDF printer driver that will work from most Windows software, including internet browsers.
If you're a bit of a hacker, you can skip CutePDF and set up a printer device that sends PostScript output to a file and use Ghostscript to convert it to PDF. Create a new local printer on the existing port "FILE:". Select a PostScript printer (the "HP Color LaserJet Series 2800 PS" works well). Then use "Program Files\gs\gs9.21\lib\ps2pdf.bat" to do the conversion.