Lois Duncan Down A Dark Hall
Resumo parcial da Wikipedia :
After Kit's mother is remarried, Kit is forced to attend Madame Duret's Blackwood Boarding School. Kit originally planned to attend school with her best friend, Tracy, but Tracy was not accepted despite having better grades. The school is far out in the country, and when Kit first laid eyes on the deserted ancient building, she felt something dark emanating from the school - something evil. She is further disturbed to find that her room only locks from the outside and that there are only four students attending the school: herself, Sandy, Ruth, and Lynda. The faculty consists of only Madame Duret, Professor Farley, and Jules, Madame Duret's son who teaches piano.
The girls begin to discover new talents, which manifest most prominently as they sleep. Lynda, who exhibited no artistic ability before attending the school, begins to paint landscapes on a professional level and signs them "T.C." Ruth finds herself able to understand and practice extremely high-level math and science. Sandy, Kit's closest friend at Blackwell, often brings her sonnets she claims were dictated to her by a woman named Ellis. The girls finally realize what is happening to them after Kit wakes up at the school's piano in the middle of the night, playing a piece she has never heard before and being recorded by Jules. She forces Jules to tell her what is going on at the school, why the students suddenly possess so many new skills, and why they only come out in their sleep.
Blackwell, Jules explains, targets young people with the ability to connect with the other side and that each of the students selected has some form of this gift. Madame Duret brought these girls to Blackwood because the spirits of diseased owners walk its halls, giving it a thin barrier between this life and the next. It is here that she can use the girls to channel great minds of the past - atists, musicians, writers, mathematicians, scientists - and continue the work they could not finish before their death. Kit begs him to let them leave, afraid of what these connections could mean, but Jules refuses.