This collection of over 200 Sudoku puzzles is published in association with The Turing Trust.
This puzzle book includes a foreword written by Sir Dermot Turing, nephew of Alan Turing and trustee of Bletchley Park, the former British codebreaking HQ where Alan Turing worke.
They are divided into three levels of difficulty, the final of which is for true experts.
Inspired the legacy of the brilliant World War II codebreaker Alan Turing, these puzzles designed to present a tough challenge.
This collection of over 200 Sudoku puzzles is published in association with The Turing Trust