Place numbers in the grid such that every row, column and 3x3 box contain the numbers 1 to 9. Each of the four shaded 3x3 boxes must also contain the numbers 1 to 9
ThriftBooks sells millions of used books at the lowest
everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We
deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15.
ThriftBooks.com. Read more. Spend less.