Cathy's breakthrough novel, Fat Boy Swim, was shortlisted for the Booktrust Teenage Prize and Blue Peter's 'Book I Couldn't Put Down.' It won the inaugural Grampian Book Award in 2004, and in 2014 was voted their 'Winner of Winners'.
Cathy has adapted Fat Boy Swim for the theatre, commissioned by National Theatre of Scotland. Her novels Skarrs and The Drowning Pond won Scottish Arts Council book awards, and Dead Men Don't Talk was shortlisted for a Scottish Children's Book Award .
Cathy is an experienced public speaker and leads many workshops in creative writing and drama.
She was the virtual writer-in-residence for the Scottish Booktrust and is mentor to young writers at Toonspeak in Glasgow.