'Twisty and clever.' - DAILY MAIL'Inventing Anna meets Agatha Christie in this brilliant Insta-whodunnit where fact and fiction blur on the dark side of #InfluencerSisterhood.' - SARAH MAY, author of BeckyHOW LONG CAN YOU KEEP A SECRET?Paige White and Hannah 'Zanna' Zagalo used to be inseparable.After their fates intertwined at university, Zanna's rise to influencer fame beckoned and she invited aspiring journalist Paige to join the ride, to create a glamorous online persona for the Life of Zanna account that others could only drool over.Together, they lived on luxury brand deals, moving into a swanky apartment and showcasing the #softlife.But after Zanna is brutally murdered, Paige continues posting - a ghostwriter emerging from behind the scenes. Five years on, with a lavish lifestyle to maintain and bills piling up, Paige is invited to take part in a documentary about Zanna's murder - which she can't afford to turn down.Then, a strange email arrives that just reads:'I know what you did.'As the cameras turn on Zanna's family and friends, old rumours start to resurface.Is there more to Zanna's murder than they know? And is someone hiding a secret?