Poison Orchids: A darkly compelling psychological thriller book promotion by Sarah A. Denzil & Anni Taylor

Poison Orchids: A darkly compelling psychological thriller by Sarah A. Denzil & Anni Taylor
An enigmatic chemist tends his prized orchid collection on a remote farm in northern Australia. International backpackers find their way there each season, desperate for work. The Chemist welcomes them all in with open arms. But what chilling, twisted secret is he hiding?

Young backpackers Gemma and Hayley arrive at the farm one summer. The farm's handsome owner, Tate Llewellyn, seems eccentric but kind, running his hobby farm and cultivating rare orchids in his greenhouse.
  
The weeks go on, a blur of fruit-picking, parties, campfires and wading beneath waterfalls in the nearby hot springs. Tate calls the girls his orchids...his pretty orchids.

Until the night the girls find themselves on a dark highway, bruised and bloodied.

How did everything go so wrong?