I'm currently writing an essay, and I'm not sure how to end the following sentence:
These books serve the important purpose of identifying and elucidating societal problems, which the readers...
What is the best way to end is:
which the readers might have been ignorant to/about.
to which the readers might have been ignorant.
I'm not certain if the second one is gramatically valid, otherwise I'd pick that one. The first sentence seems ok, but of course there's this unwritten rule that you should never end your sentences with a preposition. Are there perhaps other, better options?