Codewords
Codewords is a code-cracking puzzle where you have to match the correct numbers to the correct letters to reveal the words in the grid.
How it works
Codewords, sometimes called cipher crosswords and cipher word puzzles, are crossword-like grids with numbered squares.
Each number represents a particular letter. Using logic and observations, figure out which letters match which numbers, and completely fill the grid with words. If, for example, the number 6 is replaced by the letter A in a given location, you can replace number 6 everywhere with the letter A. Only the correct words will complete the grid.
After every 10 pages of Codewords puzzles, there are a couple of different puzzles and games to make completing the book more interesting.