Replaces the standard spell book, this spell book lists the highest rank of each spell in the book. To access the lower ranks, just hover over the spell and a list will pop up of all ranks, given there are 2 or more ranks available in your spell book.
This spell book was intended to reduce the clutter in the spell book while keeping all of the original spell book's functionality.
If you have any bugs, problems, or suggestions for this mod, you can post them in this thread below.
http://www.wowinterface.com/forums/showthread.php?t=17407
WotLK UPDATE:
I have provided a new version for WotLK Beta. That new version only works with WotLK because it takes advantage of some UI changes.