Prepare yourself for sticker shock. Either a used printed or new CD version will run just shy of $140.
2008 Jeep Patriot Compass Factory Service Manuals Set: eBay Motors (item 200471256509 end time Jun-09-10 20:10:14 PDT)
$128.22 + $11 shipping = $139.22.
You can sometimes find the CD's on eBay for about $25 but they are pirate copies. I only see the 2007 version right now which will NOT cover the drum brakes. I also did a "completed" listing search and didn't find any for '08/'09.
My Jeep: Jeep Owners Service Manuals - 4x4 SUVs, Sports Utility Vehicles, Off Road
$120 + $13.25 shipping & $6.00 Tax = $139.25.
The same place also has the printed one for $335 + shipping, etc.
Both versions have their advantages and disadvantage (outside of price).
For personal use I have always preferred the printed. It's easier to thumb threw and sometimes find different pictures that show a better view or orientation of some obscure part listed in an area that you may not consider as being pertinent.
However I have adapted to the CD. With it you have to click on link after link to keep opening subsections. This is sometimes frustrating because what you may be looking for is hidden in another area. The big advantage for me is that it's easier to cut, paste and EDIT (to avoid infringing on the copyrights) the info in the forum instead of scanning it in. Another nice aspect of the CD is that you can print out the section you're interested in and take it out with you to work on your Jeep.