ToME: the Tales of Maj'Eyal

You're probably aware, but you don't need to read all the necro lore each game. I thought you still need to read all 4 necro lore before killing Celia for the first unlock, i.e. before you could start creating Necro characters? Or easier, just play the 1.7 betas, and pray that DG has it unlocked fo...

This is a dumb question because I think I already know the answer. Is it still possible to unlock the necromancer class if you didn't read the lore before killing Celia? And if not, is it possible to revert to the save just before I killed Celia, so that I can go read the lore in the library before ...