Shannon O'Toole Books

The Final Challenge The Final Challenge
The Final Challenge
2026
The Election Calculation The Election Calculation
The Election Calculation
2024
An Unsolved Proof An Unsolved Proof
An Unsolved Proof
2024
An Artificial Test An Artificial Test
An Artificial Test
2023
An Incorrect Solution An Incorrect Solution
An Incorrect Solution
2021
A Knotty Problem A Knotty Problem
A Knotty Problem
2022
The Triangle Secret The Triangle Secret
The Triangle Secret
2022
A Sequence of Events A Sequence of Events
A Sequence of Events
2019
An Encrypted Clue An Encrypted Clue
An Encrypted Clue
2021
An Unusual Pattern An Unusual Pattern
An Unusual Pattern
2019
The Prime-Time Burglars The Prime-Time Burglars
The Prime-Time Burglars
2018
The Missing Cache The Missing Cache
The Missing Cache
2025