Her standalones are where she really stretches her legs, genre-wise. 'A Place of Execution' is a village mystery with a dual timeline, 'The Distant Echo' is a cold-case story about a decades-old murder, and 'The Grave Tattoo' delves into literary history with the Lake Poets. These aren't just random one-off cases for Tony Hill; they're conceptually distinct projects. Because they're outside the series order, she can take bigger risks with structure and ending. In a series, you know the main character will live to fight another day. In a standalone, anyone can die, and the ending can be truly bleak or ambiguous. That unpredictability is their greatest strength. You read them for a complete, satisfying, and often devastating narrative arc in one volume.