If you purchased an e-book from Kallisti Publishing or downloaded the free MASTER KEY SYSTEM from http://www.thefreemasterkey.com , you may have received this error message when opening the PDF:
 
THE VIEWER CANNOT DECRYPT THIS DOCUMENT
 
There is nothing wrong with the PDF file. Solving this problem is simple:
 
Go to http://www.adobe.com .
 
Download the LATEST version of the Adobe Reader software. (The link is usually right on the first page there.)
 
Install the LATEST version of the Adobe Reader on your computer.
 
Enjoy your e-book.
 
That's it. If you have any other difficulties, please contact Kallsiti Publishing IMMEDIATELY and we will endeavour to remedy the situation.
 
Thank you and enjoy the BEST of EVERYTHING.
 
Have fun... Tony.