In the Spirit of Codes

http://tomlinhollyblog.blogspot.com/2008/03/in-spirit-of-codes.html

Caesar (or Ceasar) square

Wisdom Times Four

http://tomlinhollyblog.blogspot.com/2008/03/wisdom-times-four.html

First identify the letter associated with single letter words. Then try the two letter words. Look for patterns that could be common words like "the" and "and", etc.

Secret Message

http://tomlinhollyblog.blogspot.com/2008/03/secret-message.html

It is a Ceasar shift! Also, look at the two letter words -- there are four of them , two of which are next to each other!