People that seen inkheart the movie what would be a character/book that a silver tounge could read that an commander of an organization of people with powers would get freaked out by but could be read by a 16 year old ?

I do online roleplay and i got a character that has a Japanese uncle that is commander of that branch of a secret agent organisation with each agent having a different power 1 of my characters a female from the uk basically has the silver tounge ability what could she read that a character can come out of to freak him out powers usually appear around the age of 16 but can be at any age through puberty