Bill Cosgrove Crypto-Crimes Investigations
Book One — The Locked Drawer
A retired financial-crimes detective in Madison, Wisconsin takes on the cases the system stopped looking at — beginning with a retired schoolteacher who lost her entire retirement from a cryptocurrency exchange account on a Saturday morning, while the police closed the file by Monday without a single callback.
Synopsis
Madison, Wisconsin, 2035. Bill Cosgrove spent three decades as a Financial Crimes detective with Madison PD before retiring to a one-room office above a bookstore on Williamson Street, where he works as a solo private investigator with Margaret's photograph on his desk and the quiet conviction that the cases that fall out of institutional systems still deserve someone who will sit with them.
When Father Leo, a parish priest, calls about Eleanor Mears — a retired schoolteacher who woke on a Saturday morning to find eighty-four thousand dollars in stablecoins gone from her NorthStar Exchange account — Bill drives east. Madison PD closed the file by Monday morning without calling Eleanor back. It is exactly the kind of case Bill left the force over: a careful adult whose carefulness was overtaken by a world that moved faster than the institutions meant to protect her.
"I had retired because I no longer wanted to be the man at the desk who agreed with the tool."
Bill works the investigation alongside Claudia, a consumer AI agent he treats the way a craftsman treats a lathe — with discipline, with specific questions, and with a refusal to let the tool do the thinking for him. He hires Ted Park, a young assistant who will learn the trade by watching Bill insist on doing it properly. Together, they pull the thread on Eleanor's loss and uncover a pattern of quiet financial crimes touching ordinary households across the city — crimes that persist because they are small enough, and the victims old enough, that the system looks the other way.
The Locked Drawer is a novel about the distance between institutional efficiency and individual justice, about the disciplined use of powerful tools, and about a detective who believes that the careful adults of the world deserve someone willing to look.
Inside the Book
Each part of the investigation teaches a real concept in cryptocurrency security and digital self-defence — not through lecture, but through the patient work of a detective who needs to understand it to find the truth.
Part One
A retired schoolteacher's $84,000 vanishes from a cryptocurrency exchange on a Saturday morning. The police close the file by Monday. A parish priest picks up the phone. And Bill Cosgrove, who retired from the force because of cases exactly like this one, drives east.
Theme · The cases the system stopped looking at
Part Two
Bill and his AI agent Claudia work the investigation the way a lathe works wood — carefully, with discipline, one specific question at a time. Ted Park, the young new hire, learns the hard way that the tool is only as good as the person asking.
Theme · Disciplined use of AI tools
Part Three
The trail leads through reused passwords, a single email address used for everything, and the quiet security failures that look like the victim's fault — until someone takes the time to reconstruct what actually happened.
Theme · Credential hygiene and digital architecture
Who It's For
A literary mystery with the pacing of a procedural and the warmth of a character study — for readers who like their crime fiction patient and their lessons earned.
Real cryptocurrency security concepts woven into the investigation — credential reuse, exchange architecture, AI-assisted forensics — taught the way they should be taught: by watching someone need them.
The book that explains, through story, what the younger generation has been trying to tell you about passwords, email, and the way the digital world actually works.
For anyone whose carefulness was overtaken by a moving world — and who deserves a detective willing to look.
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Drop your email and we'll send you a single short note the day The Locked Drawer — the first book in the Bill Cosgrove Crypto-Crimes Investigations adult mystery series — goes on sale. Want to hear about books across every age in your family? Tick the other series boxes too: Four Little PIGS for youngest readers, Rosemary & Sage for all ages, and The Lockout Club for middle-graders. One note per book release; no newsletter.
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The Locked Drawer is written for adults ages twenty-one and up. It contains mature themes around financial crime, grief, and institutional failure. There is no graphic violence or explicit content, but the subject matter and narrative pacing are designed for an adult audience.
Yes — Bill Cosgrove Crypto-Crimes Investigations is a multi-book series. Each book is a self-contained mystery that teaches real cryptocurrency and digital-security concepts through the patient work of a detective and his small team. The Locked Drawer is Book One.
Credential reuse and the danger of a single email address used for everything, exchange security architecture, the disciplined use of AI tools in investigation, and the quiet security failures that affect ordinary households — taught through story, not lecture, by watching a detective who needs to understand them to solve the case.
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