Bücher der Reihe Paths Unknown

Inheriting a castle, especially a former insane asylum, would blow anyone's mind, but its reclusive new owner, Paula, doesn't want her mind changed, let alone blown. The naive woman soon finds herself embracing the ominous incidents inside the abandoned fortress as secret messages from her ex-lover-a mad artist missing and declared dead. Whether it's the painter, spirits, or criminals causing the chaos, Paula's friends fear she won't survive long enough to find out.