Ok so I followed the instructions to find the sourcecode, and I did find it.
However, when I went to see what the tome did, it turned out to be blank.
Is it supposed to be this way?

If you're using IntelliJ you can see if the class is being called in another Class by pressing mouse 3:

All the special effects are in the same class called CommonEvents:

While holding a Tome you deal more magic damage based on the quality of the Tome.

yeah maybe I should use intellij instead of notepad++

btw check your gmail