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Case study · Mystery & thriller · 2025

The Cold Room

by Lia Tanaka, Corporate lawyer; first-time novelist

ASIN B0DPNS4QZV

A first-time psychological thriller with a structural twist that did not work in the original draft. Sam restructured the reveal placement. The book launched in August 2025, hit #1 in Amazon Psychological Thrillers for 9 days, and crossed 6,000 launch-week units.

  • 6,000 launch-week units
  • #1 Psychological Thrillers, 9 days
  • 4.7 average across 198 reviews
  • Agent submission active US/UK
Developmental editingLine editingBook cover designBook marketing (30-day launch)

Inside the project

The book on the desk, in five frames.

Working shots from this engagement — interview sessions, manuscript pages, cover concepts, launch day.

The twist-placement call is the single most common structural fix we run on first-time thrillers. Authors hit on the twist early in the writing process and instinctively place it where the writing energy was highest — which is rarely where the genre’s reader expects it. Moving the twist to where readers actually expect it is unglamorous structural work that almost always pays back at launch.

Lia rewrote three middle chapters in nine weeks. The new structure landed the reveal at the 86% mark. Reviews on Amazon and Goodreads cluster heavily around the “I didn’t see it coming” pattern — which means the structural work did its job.

“Sam told me on the discovery call that my twist was in the wrong place. I argued. He was right. The book reads completely differently with the twist where it belongs.”

Lia Tanaka, Corporate lawyer; first-time novelist

Cover rounds

Three cover concepts for The Cold Room.

The shortlist we presented to the author before round-one revisions. The selected concept is the second in the strip.

  • Concept A — typographic, restrained palette
  • Concept B — selected and revised
  • Concept C — photographic, alternative
  • Round one — typography tightened
  • Round two — final, print-ready
Lia Tanaka on writing The Cold Room 02:14 A two-minute clip from the launch-day interview. The author on what changed during the project.

Project facts

The numbers behind this one.

Services used
Developmental editing, Line editing, Book cover design, Book marketing (30-day launch)
Timeline
Dev edit 5 weeks; author rewrite 9 weeks; line edit 3 weeks; launch sprint 4 weeks
Investment band
$7,800–$9,400 total
Published
2025
Genre
Mystery & thriller
ASIN
B0DPNS4QZV

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