Bletchley Park IQ Puzzles (Saunders Eric); Arcturus, 2021

This book forms part of a series of puzzle books produced by the Bletchley Park Trust. Follow in the footsteps of the Codebreakers and establish whether you have the puzzle-solving skills needed to have worked at wartime Bletchley Park. Other titles in the series are Codebreaking Puzzles, Cryptic Crosswords, Number & Mathematical Puzzles, Brain Boosting and Brain Training Puzzles, Logic Puzzles, One Minute Puzzles, Codewords, Crosswords, Sudoku and Wordsearch.