
Siobhan Hayes spent her formative years at a Catholic convent school in Crosby, Merseyside. Later she studied English at university and worked for the Civil Service. A spell as an earth mother to her three sons followed, where she also did voluntary work with children and teenagers.
Her time is currently spent writing and working for the family business, an oil and chemical consultancy but spends much of the time escaping for long walks by the sea.

An idle glance through the window of a bus changes everything for Katy Rivers.
A mysterious girl, with luminous green eyes, stares back and from that moment on she haunts Katy and appears to know her every move, even what she is thinking. What is the strange connection between them? And what is the power of the emerald pendant which the girl bestows on her?
‘I’m everything you’re not and I’m going to take over your life … I’m your worst nightmare.’
These chilling words mean that Katy is gradually backed into a corner, alienated from everyone she holds dear, even her own mother. Only her best friend, Luke, keeps faith and together they must find a way to defeat the girl, who is determined that she will be with Katy … even until death.
Poison Heart combines psychological suspense with teen romance and makes for a thoroughly chilling read.
| Territory | Publisher/Agent |
|---|---|
| World | Darley Anderson Agency |
| UK & Commonwealth | |
| Brazil (Portuguese) | Bertrand Brasil |
| Croatia | Leo Commerce |
| France | Robert Laffont |
| German | DTV |
| The Netherlands | Van Goor/ Uniboek |
| Norway | Aschehoug |
| Poland | Zielona Sowa |
| Portugal | Livaria Civilizacao |
| Russia | AST |
| Spain | Maeva |