Sudoku Books

Each row, column and 3x3 square contains numbers from 1 to 9. The goal is to fill all empty boxes with the appropriate numbers. The game increases your observation skills and makes you think more. It has note taking feature so that you can insert possible numbers in some blank fields without enough data yet. Six different color options allow you to distinguish possibilities. You can also get hints when you get stuck.
Grouped puzzles in the game are represented by books. You will finish the books according to the level you choose. You will improve as your library expands. Enjoy the puzzles!