While I think both would be very interesting, I just don't know that there would be much to read about the history of necromancy, because it's not a guild, but a magickal practice. The records would probably be scattered and scarce.
Eh, not totally. Cultural attitudes and local practices on necromancy are interesting, such as Dark Elven attitudes towards profane necromancy and sacred necromancy because it adds a complicated, more significant dimension.
Then again, this question (no, the topic) is pure
[censored] since necromancy was legally practiced in the Mages Guild before Traven. They ought to have records of necromantic rituals all over the place. Plus, Cyrodiils tolerated its practice on dead criminals as necromancers gave their service to the Empire, despite cultural prejudices and protests from Arkay's clergy.