Reading wasn't something Kaya needed in her old life. She was born in a humble country village by the Northern mountains, where most people didn't know most things about the world. Then she caught an incurable, mortal disease, and she spent the rest of her life in an abandoned hut, far from human contact other than the boy he ended up falling in love with. There was absolutely no need to be literate.
Here, in the prison, ignorance got you nowhere. Especially because you can't even read the map. It was scary at first, but now it's exciting.
"I've been thinking about going to the library later and try an easy one!" This new prison's effect urged her to be more daring. "I just wouldn't know which to choose. Probably not that one about the sad lady, those words seem too hard for me right now."