I have completed the main quest, I was in the shrine, but I didn't want to stop enjoying the story to look for the plaques when I was there. Now I can't figure out where it is or how to get back in.
Can I not get back in now? Is that area ONLY available when you have the quest? That would be pretty crappy.
Most lorebooks in locations that become unavailable show up by the entrance or in a neutral location afterward. I'll try and replicate your issue and see if I can find a solution!