The Liars by Petronella McGovern

A WIFE BURNING WITH RESENTMENT. A HUSBAND HIDING THE PAST. THEIR TEENAGE DAUGHTER CRUSADING FOR THE TRUTH. WHO CAN WE TRUST?

The close-knit community of Kinton Bay is shocked when fifteen-year-old Siena Britton makes a grisly discovery near a cave in the national park. Siena believes it's a skull from the town's violent colonial past and posts a video which hits the news headlines.

But her parents, Meri and Rollo, think the skull is related to their teenage parties in the Killing Cave back in the 1990s. 
And a school mate who went missing then.

None of them foresees the dangers that the discovery will create for their family. The dangers of past deceits, silences and lies that have never been resolved.

The Liars is a heart-stopping cocktail of family secrets, sinister unsolved disappearances and a community at war with itself.