In archaeology, an intrusive find is something that should not be where it is.
On a riverside field on Deeside, Dr Fen Imrie is excavating thirteen pits dug ten thousand years ago. They may be the oldest calendar in the world, and this should be the season that makes her career.
Then a student lifts a pebble from a sealed pit with a number scratched on it. Eight weeks later the excavation's own records give that same number to a grave.
The woman in the grave died four thousand years ago.
She was tall for her time. She had broken her left wrist, and someone had set it well. She was buried with great care. Every laboratory that examines her finds something it cannot explain, and the last one finds the thing nobody can say out loud.
Accused of faking her own discoveries, Fen has to choose between defending her name and believing her evidence. Meanwhile her teenage daughter is watching her with growing alarm, and the old farmer who owns the field has a biscuit tin he has been keeping for a long time.
Intrusive is a quiet, uncanny and deeply human novel about archaeology, evidence, mothers and daughters, and the one find that cannot be written up. From the author of The Kairos Testament and Scripta Manent.