The Puzzle Doctor is back! 150 easy to hardsudoku puzzles in a smaller, more portable trim size.America has got a fever...and the only prescription is more sudoku!First there was Sudoku Fever, now puzzle fans have come down withsudoku mania. But this next title in the series is the perfect cure.Features:-150 easy to hard sudoku puzzles-*Edited by legendary New York Times crossword editorWill Shortz-Big grids with lots of space for easy solving.