There are several locations, that are only acessible during quest, or even only on certain quest stage, and after the quest is finished, you cannot return there at all. In Abamath, Malabal Tor, there are 2 quests, one is inside, and not on the main path. If you complete another quest, and exit Abamath, you will not be able to go back, and take this quest. Your lorebook collection is also will forever be incomplete, with books from this quest not appearing anywhere else. There is absolutely no reason for it. And it is not the only location. Temple of Auri El in Vulkel guard, Morvunskar, there are many more, locked for no reason at all. ZOS, could you please make this locations acessible, so people who missed quests and lorebooks, could go and finish their collections?