The technique I am aware of requires that you have permission from the person to read their Akashic record. And that includes the higher self. If the higher self says no, good luck. There was never any mention of Librarians in the course. It's possible this technique just doesn't involve librarians, without excluding them from being a part of the Akashic records. There are a lot of different techniques out there.
More importantly the technique established that your intentions affect what you get when you read an Akashic record. If you are not neutral, it will feed you whatever you want to find. It's a protective measure. In other words, it gives false information if you come at it with a motive. Also the Akashic records is just a local thing. There are halls that record stuff elsewhere for different galaxies, realms, and dimensions.
None of the techniques I have been taught actually have you go to the records. You visualize a connection to open it, close it when you are done. Use a pendulum, ask questions, that sort of thing. All local here in the present. Probably why I never got into it. I'd much rather go there directly if I could.