According to the wiki, and multiple discussions, Dragonborn Black Books (of Hermaneous-Mora) remain as quest items and cannot be dropped or sold even after the relevant quests are complete.
These discussions may be outdated. Are Black Books still not droppable even in the special edition?
To try to solve this I've looked at the mod Black Books Begone and Droppable Dragonborn Black Books, but they each have drawbacks: the first lets you drop them only in a specific house, the second appears to have a lot of bugs.
I also imagine there are ways using the console, but I haven't been able to figure out how to accomplish that safely.
How can I drop Black Books, without causing their quests to break, introducing bugs, or interfering with any mods?
Solutions that work for either the Special Edition, or the Non Special Edition, would both help.
Best Answer
There's a mod specifically designed to remove the Black Books from your inventory, which you can find here, though I do not know whether you can use this mod on the special edition or not. (As an aside, according to the page for the mod, this mod has caused 0 computers to blow up, so that's a good sign it won't break your game.)
If you don't want to use a mod, it looks like you could also use console commands to remove them from your inventory (as well as add them to a container). The relevant console commands would be:
and
The item IDs for the black books are
XX016E2C,XX01E99E,XX01E99F,XX01E99D,XX01E99C,XX016E2D, andXX016E22.It's worth mentioning that according to a user here, picking up one of the books again will cause you to be teleported back to Apocrypha, so be wary of that if you choose to put the Black Books somewhere other than your inventory.
Also, this sort of goes without saying based on the nature of the books, but you most likely want to be completely done with the Dragonborn questline before removing these books from your inventory, or else you might break something.