Anyone know of any good Necromancy websites/books?

Hello to all who can help. My friend and I are working on a new world with a new kind of way to use classes with d20 (its akin to Baldur's Gate: DA for those who have played that game and know how those classes work).

We are looking for some good Necromancy abilities and some good guidelines for having a game mechanic that the necromancer, because he is tapping into negative energies, gets twisted over the course of time in either temporary or permanent ways. I have the Necromancy college book from Green Ronin, and I have looked at the other Necromancy book by another company (can't remember the name of company), but so far we have only few ideas for the kind of necromancer we are wanting to create.

Basically, our Necromancer is going to be a person that dabbles with negative energy and its this negative energy that provides it much of its abilities. Most to all abilities the necromancer gets are probably going to be similar to spell-like abilities. Anyways, with our world the way we are going, the farther along the necromancer goes (higher in level), the more twisted and evil he becomes. The negative powers being used corrupt his soul eventually and it shows in physical ways. That's all I can think of for now, but I wanted to provide some information so if anybody knows of any other good books on necromancy and/or websites that provide different takes on it, I would really appreciate it greatly.

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