Here is a word cloud generated from my book, Walking Barefoot: Living in Prayer, Faith and the Power of God. What is interesting about word clouds is that they are generated according to word frequency in a document. Words that occur more frequently appear larger in the cloud.
There is an interesting effect that occurs here with red, blue and green on a field of black. The red stands off the page a little bit. Click the image above for to see this more prominently.