The Puzzling Adventures of Dr. Ecco

Dr. Ecco is a mathematical detective and puzzle solver. In this book readers are invited to join him in solving nearly 40 puzzles inspired by methods in computer science and mathematics, including The Tower of Lego, the Odd Doors Problem, Spies and Double Agents, Gossiping Defenders, Code Breaking, and many more.

Acknowledgments
Preface
The Adventures
  Introduction
  Eccentrics
    Minority Rules
    The Tower of Lego
    Odd Doors Problem
    The Coach's Dilemma
    Maximum Flow
    Critical Paths
  First Spies
    Spies and Acquaintances
    Spies and Double Agents
    Rocket Assembly
    Offshore Oil Well
  Experts
    The Campers' Problem
    Pebbles and Persuasion
    The Architect's Problem
    Circuits Checking Circuits
    Gossiping Defenders
    Delicate Balances
  "Polluters, Suitors, and Tigers"
    Warehouses and Barrels
    Party
    Code Breaking
    Code Invention
    Spacecraft Malfunction
    Escaped Tiger
  Industrialists and Generals
    Speculations
    Railroad Blues
    Flighty Ideas
    The Rotary Problem
    The Contract Problem
    Command and Control
    Wrong Number
    Fakes
  Fame
    Knowledge Coordination I
    Knowledge Coordination II
    The Couriers Problem
    Road Work
    Country Roads
    Subway Layout
  Vanished
    Puzzle-Mad Kidnapper
    Mystery
Solutions to Puzzles