The Google Book Search Blog announced a neat new feature that allows you to peek into the book via what is known as a cloud tag. The cloud tag shows you the most common terms and phrases used in the book, with the bigger the terms, the more that term is used in the book.
For example, let’s take a look at Search Engine Optimization for Dummies. If you scroll down to the “Common Terms and Phrases” section, you will notice this cloud tag:
If you click on any of the terms in the cloud, you will be taken to a page that highlights where in the book the terms show up:
Interesting to see [Yahoo] is way bigger than [Google] in this particular book.