I have used this piece of software before and i think its great for reading files published in pdf format. The only issue with this software is that it is over 20 megabytes to download. Some people still have slower connections like me and 20 megabytes is a long time to wait.
I found and installed another pdf viewing program called Foxit Reader
Taken from the www.filehippo.com website
"Foxit Reader is a free reader for PDF documents. You can view and print PDF documents with it.
The download size is around 1MB, so you can download it quickly. It doesn't need any lengthy installation, so you can start to run it as soon as you can download it.
And it starts up immediately, so you don't need to wait the annoying "Welcome" screen to disappear."
I prefer using Foxit Reader over Adobe Acrobat because of the size difference, they both do the same job except Foxit Reader is much smaller, and essentially quicker.