Anna was still used to being in this WORLD, much less being in space. The whole thing was terribly overwhelming, going from the more natural environment of Arendelle, to the high-tech world she was in now.
Still... one thing that was the same at least... BOOKS!
Anna LOVED to read. it was one of her favorite hobbies, and pretty much got her through the loneliness of her teen years. So when she saw the bookstore, it was like a wave of relief washed over her. Finally, something she could relate to here!
As she tentatively walked through the store, she was so busy trying to see everything, that she completely missed the girl RIGHT IN FRONT OF HER. Boom.