The Birch Lane Book Club Does Not Commit Crimes

Cozy Caper · Sweet / Closed Door · 24 chapters + epilogue · 60K novel · 1st person

Complete planning package, 129 pages: the premise, a full codex, every chapter outlined, an AI prompt for every chapter, and the whole launch kit — listing, blurb, keywords, posts, newsletter, reader magnet ideas — already written. One buyer only. When it’s claimed, it’s gone.

Hattie Doran moved to Cairn Hollow for a quiet life — a lake village, a teaching job, and a low-drama book club that meets in a bakery kitchen once a month. The Birch Lane Book Club drinks excellent wine and occasionally discusses the book. Hattie is the only one who reads it. She has decided this is charming.

Then Lorraine Peel — bakery owner, club founder, cheese board architect — sets down her glass and says the sentence nobody saw coming:

"I swapped it. In 2006. I swapped it, and I would like you to help me put it back."

The it: a rare 1931 first edition sitting in a locked heritage case in the Millpond Public Library — except the one in the case is a forgery, and the real book has just turned up at a flea market in a box of cookbooks. The window: nine days. Because a televised rare-book expert is arriving to authenticate the library's prized possession on camera — and he is the original donor's nephew, he arranged the whole thing himself, and he has been waiting twenty years to catch the wrong book in that case.

Solving this will require: a retired bookbinder who is not sorry about anything, a lake-tour boat captain who narrates every situation as though conducting a guided excursion, a dentist with a Fenix HL60R flashlight (1200 lumens; it doesn't turn down), a part-time library assistant who turns out to have every key in the building, and a knowledge of Victorian typography that is about to become extremely relevant.

Nobody commits any crimes. Technically.

This is a fair-play cozy caper set in upstate New York — the kind of mystery where the clue is planted in Chapter 1, the warmth is structural, and the most dangerous thing in the room is the cheese board.

WHY THIS WILL SELL

→ The Bookstores & Libraries category is the highest competition-adjusted return in the cozy mystery market. Market-Matched™ data puts Bookstores & Libraries at $84K/mo estimated Kindle royalties with a Sales vs. Competition Index of 70 — the best ratio outside Historical. Library-set cozy mysteries are rising year-over-year and underserved by premium titles.

→ The forgery crime type is functionally uncontested. Forgery represents less than 2% of the cozy mystery market with a Competition Index of 16 — so low it reads as a niche not yet owned. This book doesn't fight for shelf space with the crowded murder mystery segment; it owns a quieter, uncontested category.

→ The victimless caper fills a real and growing reader appetite. The Murder sub-category dominates at $478K/mo — but its competition pressure is brutal. The cozy reader actively seeking no-death mysteries has very few options at this quality level. "Nobody commits any crimes, technically" is a direct market signal to this underserved reader.

→ The book club framing has an established commercial comp with enormous sales history. The "ensemble of amateurs solves crimes" format — anchored by Richard Osman's Thursday Murder Club — is proven at scale. This book is positioned directly on that shelf without being a derivative. It earns the comp rather than borrowing it.

→ The ensemble cast is built for series longevity. Five immediately distinctive characters — each with her own running gag, her own competence, her own moment — give readers five reasons to return per book. Series readers commit to characters; this structure reduces marketing cost as the series grows.

→ The November/library setting has strong seasonality leverage. A library cozy with a gala climax is a natural positioning for fall/winter reads, holiday gifting, and comfort-read seasonal marketing. The setting is a marketing asset, not incidental.

TROPES

• Book club mystery
• Amateur sleuth ensemble
• Cozy caper / victimless crime
• Library setting
• Small town
• Race against the clock (nine-day countdown)
• Reluctant amateur detective
• Found family / ensemble warmth
• Secondary romance (closed door, slow burn, HFN)
• Running gags as structural tissue
• Fair-play mystery (clue planted in Chapter 1)
• Antagonist-as-comic-obstacle (not villain)
• Bookshop / rare books world
• Autumn / November setting
• Community event climax (televised gala)

HEAT LEVEL

Sweet / Closed Door — no murder, no violence, nothing more intense than a nerve-wracking after-hours library operation. The secondary romance (Hattie and Oliver) develops through trust established during the caper; it closes in the epilogue at HFN with no intimate scenes. This is a caper in the warmest sense: the highest stakes are embarrassment and a lost library donation. Running gags are structural. Warmth is load-bearing.

COMP AUTHORS

• Richard Osman — The Thursday Murder Club
• MC Beaton — Hamish Macbeth / Agatha Raisin
• Agatha Christie — Miss Marple
• Alexander McCall Smith — The No. 1 Ladies' Detective Agency

WHAT'S INSIDE

Story Premise — The full setup document: five-part premise, mystery engine, character roster, setting, voice profile, and series position. Everything a writer needs to understand the world before writing a word.

Complete Codex — The series bible and mystery architecture in one document: all ten codex sections, the full Crime Bible (hidden chronology, mechanism, clue table, alibi grid, custody list, knowledge audit, Someone-Else Test, canon numbers, spoiler rules), and character voice profiles with working dialogue samples. Mystery logic cross-checked against fair-play standards throughout.

Chapter Outline — A scene-by-scene beat sheet for all 24 chapters and epilogue. Nine-day clock, surface and hidden timelines, chapter-opening conventions, four running gags tracked across every chapter, "Hattie knows by the end of this chapter" state updates, and complete three-act pacing with set-piece architecture.

AI Chapter Prompts — 25 fully self-contained prompts (Chapters 1–24 + Epilogue), each opening with a complete knowledge-state summary so every chapter can be written in a fresh session without losing continuity. Character profiles, mystery logic, running gag tracking, and scene-specific instructions embedded in every prompt.

Marketing Materials — Full launch kit: Amazon listing (full description, back cover copy, 50-word short blurb), three Instagram posts, two TikTok/BookTok scripts, two Facebook posts, newsletter body with three subject line options, two Ideogram cover prompts, and three reader magnet concepts with a recommended pick.

Market-Matched™ Brief — Internal strategy document: nine-dimension market snapshot with keyword rationale, competitive positioning table against five comp authors, recommended Amazon categories, pricing and KU strategy, cover direction, and series launch stagger plan.

A warm, dry, fiendishly plotted cozy caper — library setting, victimless crime, ensemble of five women who are more competent than they look, and a nine-day countdown to a televised authentication that cannot go wrong. One buyer only — this story is exclusively yours.