Author: Conceptis Puzzles
Publisher: Sterling (2006)
Condition: The covers are edgeworn with a crease to the back corner and minor shelfwear. Very Good. Pages are clean and unmarked. A well bound copy.
Dimensions: 25.3 x 20.2 x 2 cm
The basics are simple: just fill in the empty squares using numbers from 1 to 9 so that the sum of each horizontal set of squares equals the clue on its left, and the sum of each vertical set of squares equals the clue on the top. No number can appear more than once in any sum.An introduction explains all the rules, gives good solving tips, and takes beginners through a sample puzzle.