Four girls witness the murder of their friend but cannot remember the killer’s face. The victim’s mother extracts a secret vow of penance from them—a vow that festers for fifteen years. Why it fits: The secret is the repressed memory. The novel explores how keeping a secret (the identity of the killer) can rot the soul of everyone involved.
Several authors have made significant contributions to the Himitsu novel genre. Some notable examples include: himitsu novel