If you are a heavy reader and/or buyer of books, unlike myself, you might like the Google Books Unity lens. With this lens, you can search for books right from the Unity dash.
To install, run the following commands in the terminal:
sudo add-apt-repository ppa:davidc3/books-lens
sudo apt-get update
sudo apt-get install unity-books-lens
Log out or restart the computer to make the lens appear in the Unity Launcher.