Secret Code Breaking Puzzles For Kids: Create And Crack 25 Codes And Cryptograms For Children Aged 6 To 10. Great As A Gift For Junior Spies By Publications, Happy Bear By Thriftbooks
1000 Cryptogram Puzzles Brainboosting Word Challenges For Puzzle Lovers: Decode Hidden Messages Across 34 Engaging Topics For Fun And Mental Exercise By Thriftbooks
Brain Games Codeword Puzzle: Unscramble The Alphabet, Fill In The Grid, And Solve The Puzzle! By Publications International Ltd Brain Games By Thriftbooks