Books UnBound, the database of online CLE Books from the State Bar of Wisconsin, has added some new features recently.
My favorite new feature is the ability to search across your entire Books UnBound library from the home page. 
You can also now access Books UnBound from your mobile device. Other features include the ability to add notes, turn footnotes on and off, contribute to forums, keep track of time spent for billing purposes, and pick your font size.