Scarlet and Ivy Books in Order

When Scarlet disappears from Rookwood boarding school, her shy twin Ivy is sent to take her place. Ordered to impersonate her sister, Ivy follows hidden journal entries to investigate what happened while the school staff guard their secrets.

Back at Rookwood, Scarlet and Ivy face a cruel headmaster and unexplained thefts. With Scarlet blamed for missing possessions, the twins investigate after dark, uncovering traces of an old crime that may still threaten the school's pupils.

Scarlet looks forward to a ballet recital until the twins' beloved teacher disappears and Madame Zelda replaces her. Poisonous letters and suspicious accidents disrupt Rookwood, sending Scarlet and Ivy searching for whoever is putting the students in danger.

New pupil Ebony fascinates the younger girls at Rookwood, but unsettling rumors surround her. When a Halloween prank goes wrong and she is blamed, Scarlet and Ivy question whether the apparent culprit is hiding something or being unfairly targeted.

A school trip takes Scarlet and Ivy to an old hotel beside Lake Seren. Strange events involving the guests, stories of submerged church bells, and lights beneath the water lead the twins toward secrets concealed by the lake.

Returning to Rookwood after the holidays, Scarlet and Ivy discover that the school's survival is threatened. Their investigation draws together enemies from different parts of their past, as they follow clues toward a secret that could determine its future.