1. Download the AceSudoku game on your mobile phone
2. Open the game by clicking on the icon on your phone
![](https://www.acesudoku.com/wp-content/uploads/2022/05/cropped-Ace-Sudoku-Final_Icon_512x512.png)
3. Open the main puzzle of the book
![](https://www.acesudoku.com/wp-content/uploads/2022/07/unlock_1.png)
4. Click on the blue bar with the text “VIEW ALL … BOOKS”
![](https://www.acesudoku.com/wp-content/uploads/2022/07/unlock_2.png)
5. Find your book in the list
![](https://www.acesudoku.com/wp-content/uploads/2022/07/unlock_3.png)
6. Click on the button “UNLOCK THIS BOOK”
![](https://www.acesudoku.com/wp-content/uploads/2022/07/unlock_4.png)
7. Enter the first 6 digits or letters of a certain puzzle and a certain row
Search for the solution in the back of the book.
![](https://www.acesudoku.com/wp-content/uploads/2022/07/unlock_5.png)
If you enter the correct 6 digits/letters all the puzzles unlock and all camera icons are gone.
If you have problems, contact us at info@acesudoku.com.