lweismann's page

So, if the PCs defeated him, presumably they could take the book and engage in a little infernal fine dining?

Hmm, interesting way to template a PC after the fact and not affect your Level adjustment...

Also, if that is allowed, maybe limit it to those of the same bloodline, ie: at least tieflings for infernal and etc...

I like it too, but I would probably either:

make it unique (great mcguffin then too)
make it +4 unless attuned (soaked in snake venom?) to get the auto-win
make it cause your character to be fatigued after 1dx rounds

give a cumulative bonus eg:
start at +4 and give an additional +2 for every time you level when you own it. Oh and if you let someone else use it or it's stolen the bonus restarts.
or
bonus equals 4 times (character level + initiative modifiers).

Some of these would keep it from being game breaking for high levels as suggested, but still allow it to be useful if kept around.

I like it. As a DM who plays about 40% of the time, I like a magic item that looks ordinary, isn't difficult to use (I mean, a use magic device check to draw on a wall? If that was true it would have kept me out of so much trouble when I was 3).

The part of this that is great is the fact that it is devastating in the hands of an inventive DM or player.

Need to read a paper you know has explosive runes? draw a blast shield and read away.

Need a Temple of doom-style trap? Now you TOO can get back at the DM for his arrow-trapped corridors.

It's kind of a limited Green Lantern ring.