THE HERALDRY OF LOT 14

Phoebe Vane has built a quiet career on other people’s dead relatives — verifying lineages, authenticating heirlooms, finding the document that proves what a family wants proved and occasionally the one that proves the opposite.

Then she opens the archive at Aldermere Hall and finds a forgery forty years in the making.

Before she can decide what to do with it, there’s the archivist’s private correspondence log showing six undisclosed meetings with the solicitor who hired her, a Latin annotation in the margin of the oldest pedigree document that only a professional would recognise as a confession, an uncatalogued box tucked in the back of Lot 14 that contains the three documents the forgery was built to erase, and a body in the locked archive room before she can tell anyone what she’s found — locked, she’ll eventually understand, from the outside.

She’s spent her career treating neutrality as her whole professional identity: she finds what the records say and reports it, and what happens next is not her responsibility. That position has never cost her anything she couldn’t afford to lose. He left his mainland detective post after his own careful, overruled judgment cost an innocent man a year of his life, and he’s spent eleven years since managing other people’s truths in a country house legal practice rather than testing his own again. Neither of them can name the killer — or trust each other — without choosing honesty over the habit of self-protection they’ve both mistaken for competence.

A traditional, closed-door English country-house mystery for readers who want a fair-play puzzle they can actually solve. The kind of book where the most dangerous person in the house is the one who knows how to read a document.

WHY THIS WILL SELL

→ Amateur Sleuth carries a 100 sales-to-comp index (Hot Mainstream) with 170 estimated daily sales per top 20 title — the single strongest dedicated mystery category tracked

→ Dual-category positioning with Mystery > Historical unlocks a second active list ($89K estimated monthly royalties) via the genealogical research hook — no period-setting overhead required

→ Wedding occasion is the highest-royalty occasion trope in the dataset at $89K monthly and rising — the four-day countdown gives the book built-in structural urgency

→ Fraud as primary crime carries a 58 sales-to-comp index — stronger than most murder subtypes — used by only 1.1% of current titles

→ Zero direct competitors for a genealogical-forgery premise in the current Top 100, despite mainstream cultural appetite for lineage-and-secrets plots

→ Specialist-knowledge protagonist differentiates cleanly from the saturated culinary and craft-hobby amateur sleuth the current Top 20 is built around

TROPES:
• Amateur sleuth with specialist knowledge
• Manor archive setting
• Wedding countdown frame
• Forged pedigree murder
• Inheritance-driven crime
• Slow-burn closed-door romance
• Country-house-party suspects
• Fair-play whodunit
• The Expert Who Knows Too Much
• Records Don’t Lie (But People Do)
• The Solicitor Who Tells Half the Truth
• Proof of Character as Grand Gesture

HEAT LEVEL: Sweet / Closed Door

Perfect for fans of: Rebecca Tope, Merryn Allingham, M.C. Beaton, and Dee MacDonald