The Mystery of the Cracked Wall

After a visit to the future and a message from herself, Bess Hooper hits a wall. After the disappearance of her best friend Eloise, confusing clues which seem to be unrelated intertwine to make the mystery almost impossible to unravel.
With the company of her brother Tom, her cousin Clancy and Holland who hs returned to Endless Hiccup, Bess travels to Smackleton and meets up with Maisy. Together, the five teenagers contact the dead and receive a message from the past. In the chaos, Bess catches up with an old friend.
Haunted by a woman from over a century ago, the truth is slowly recognised and the result shocks them.
In this, the sixth book in the series, what's revealed throughout the story ends in fear for Bess Hooper.