I think it's absolutely necessary, to make sure there aren't any glaring inconsistencies. I'm writing a prequel for my big bang this year, and I know I'm going to have to reference it quite a bit to get things just right. :)
Good good, I just realised I'd never asked anyone else what they do before and then someone pulled me up on it and I was like, well duh, of course I'd re-read! Inconsistencies really bug me as well so this is the best way to avoid them :)
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Inconsistencies really bug me as well so this is the best way to avoid them :)