A saboteur on Columbus's Santa Maria.A girl with the voice of a split Berlin in her ears.A communist agent undermining a fascist MI6.Spies can change the course of history, and and in the six thrilling stories of Substitution Cipher, they do. Each tale fo
Ask yourself: If at the end of the year, you had accomplished one thing, what is the one accomplishment that would make the biggest difference to your happiness? Next
