World book Advanced E-Book Center is a great resource for doing research.  I looked up Andersen's Fairy Tales and found the tools very useful.  I work with a child who has a hard time reading so her comprehension is not as good as it should be when she reads to herself.  The read aloud tool would work great for her.  I also like the fact that they have the fairy tales right there in the book but when you need to do a research paper they have other facts that are easily accessible and related.  Saves a lot of time searching when it is already done for you.