Gilly MacMillan Books in Order

To follow DI Jim Clemo from the start: What She Knew / Burnt Paper Sky → Odd Child Out.
For twisty psychological standalones: The Perfect Girl → The Nanny → The Long Weekend.
If you like true-crime podcasts and cold cases: I Know You Know.
If you enjoy writers and stories about storytelling: To Tell You the Truth.
For high-stakes wealth and dark academia: The Manor House / The Fall → The Burning Library.

Gilly MacMillan writes twisty crime and psychological thrillers that start in familiar places and then push her characters to the edge. Her stories often begin with a single bad decision or missing person and trace the damage that ripples through families and communities.

She grew up mostly in Swindon in Wiltshire, with a stretch of her late teens spent in Northern California. Moving between English suburbs and the West Coast gave her a feel for contrast, from quiet streets and grey skies to big horizons and new voices.

At university she studied history of art at Bristol, then completed further study at the Courtauld Institute of Art in London. Before she ever published a novel she worked for an art magazine, spent time at a contemporary gallery, and later taught photography to sixth form students.

Looking hard at images for years taught her how mood, light, and small details can tell a story. When she began writing fiction while raising three children in Bristol, she brought that same close attention to the way people stand, speak, and hide what they feel.

Her debut novel, What She Knew (also published as Burnt Paper Sky), follows the disappearance of a young boy from a Bristol park and the fallout for his mother and the detective leading the case, DI Jim Clemo. The book was nominated for major crime awards, translated into many languages, and introduced readers to a city and a detective she would return to again.

In The Perfect Girl she turned to the story of a teenage piano prodigy trying to rebuild her life after a terrible mistake, while Odd Child Out brought Jim Clemo back to investigate an incident between two schoolboys that exposes illness, migration, and simmering social tension. Together these books show her interest in how class, race, and family expectations shape the stories people tell the police and themselves.

I Know You Know experiments with a true-crime podcast structure to pick apart a cold case, letting a film-maker and a detective circle the same tragedy from different angles. The Nanny and To Tell You the Truth stay closer to home, digging into motherhood, memory, and the uneasy line between imagination and reality.

More recent novels such as The Long Weekend, The Manor House (published as The Fall in the UK), and The Burning Library widen the canvas again, from an isolated barn in the Northumbrian hills to a glass-walled lottery dream home and an academic institute tangled up in secret societies. What links them is a steady interest in pressure points: money, friendship, ambition, and the secrets that sit underneath ordinary lives.

MacMillan lives in Bristol with her husband and three children and now writes full time. She often sets her stories on the streets, waterways, and estates around the city she walks every day, and she has spoken about weaving small pieces of her own experience into her characters. The result is crime fiction that feels grounded in real rooms and real weather, even when the plots twist in unexpected directions.