Compelling & addictive Codeword is the cracking alternative to Su Dokus & Crosswords. The concept is simple. Each number represents a letter so starting with the solved letters use your logic & vocabulary to reveal more letters form words & then crack the code! The Codeword series is so popular because you dont need any prior knowledge unlike a crossword. You can just pick up a pen & get puzzling. It steadily increases your vocabulary as the difficulty slowly grows as you progress through the book & even though youll be working your brain its the perfect way to unwind.