PDF stands for Portable Document Format. A PDF book is one that can be read on most computer operating systems, such as Windows XP, Linux, Mac OS X, and even Mobile devices.
The most popular way to read a PDF book is with the free Adobe Acrobat Reader. This is so popular that there's a very good chance that you already have the software. To test to see if you have the free Adobe Acrobat Reader, click the link below. (This is a PDF sample of what our books look like.)
If you can view the document below, then you will be able to read our books straight away! If you can't see the document, then you need to download the free Adobe Acrobat Reader. Click the link to go to the Adobe download page