About G.R. Halliday

G. R. Halliday is a Scottish crime writer best known for his gripping DI Monica Kennedy series, set against the stark, atmospheric backdrop of Highlands of Scotland. Drawing on his background in history and psychotherapy, Halliday crafts dark, psychologically rich narratives that explore not only crime, but the complex inner lives of those caught up in it.

His debut novel, From the Shadows, introduced readers to Detective Inspector Monica Kennedy and established Halliday’s signature blend of tension, emotional depth, and a vivid sense of place. The series continues with titles Dark Waters and Under the Marsh, each weaving intricate plots with haunting themes and morally complex characters.

His fiction is distinguished by its psychological realism, moral ambiguity, and an unflinching exploration of trauma, making him a compelling voice in contemporary Scottish crime writing.

In 2026 ITV will be releasing a new crime thriller called The Dark based on the first in the DI Monica Kennedy series - From the Shadows.

When not writing, Gareth works as a psychotherapist, enjoys climbing and wild swimming. He lives in the Highlands with many rescue cats and his partner.