User blog comment:Miskos3/Fairy Tail Chapters 532 & 533, Review/@comment-7070784-20170422053208/@comment-5303512-20170424163817

Literally can be used in a mental sense as well. So no.

The mansion exploding did not appear to have effected her reading as she was underground too.

It can if you can remember what you see which is easy for her, and she managed to uncover it's secret which is why she cannot burn it not by simply knowing the cover.

It is not that hard to understand and believe when I characters written to beat that capable of remembering and deciphering the code inside the book. She is just that good.

Wizards are experts on mental concentration, that is vital to them, it is not surprising that there are geniuses as well

This is fiction, so mental capacity limits are thrown out the window, Lucy can remember and decipher the story, it's as simple as that, just like logic, especially magical ones.