Sudoku For Dummies, Volume 2 will offer 240 original andaddictive puzzles including new circular and 16 x 16 puzzlesto add new dimensions to game play and keep the most avid Sudokufan entertained.  Of the 240 puzzles, 220 are the popular 9x9puzzles, 10 are 16 x 16, and 10 are circular puzzles. Within eachof these categories there are Easy, Tricky, Tough and Diabolicalpuzzle ratings; and each puzzle is clearly identified with therating. More than just a listing of puzzles, Sudoku For Dummies,Volume 2 features a chapter explaining how to solve puzzlesand the strategies involved.  Additionally, readers receiveall puzzle solutions in the back of the book. Finally, SudokuFor Dummies, Volume 2 includes a brief history of Sudoku (or SuDoku) for those interested.  Descriptions of the newer typesof puzzles are listed below. Circular Sudoku (10 included:  3 Easy, 3 Tricky, 2Tough, and 2 Diabolical)The rules are similar to the normal 9x9 Sudoku but with someimportant differences. The puzzle is circular for a start, with 8concentric rings. Each ring must contain the numbers 1-8 and eachsegment running into the centre of the circle and through to theopposite side of the circle must contain the numbers 1 - 8 and orcourse there can be no duplicate numbers. 16 x 16 Sudoku (10 included: 3 Easy, 3 Tricky, 2Tough, and 2 Diabolical)The grid is larger at 16 x 16 and solvers must fit the lettersA-F into the grid alongside the numbers 0-9. 16 x 16 Sudoku aremore difficult, take more time and are more infuriating than thenormal puzzles - but just as addictive!