Sudoku U Junior Year

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We’ll school you in sudoku! Find your grade, improve your play - and graduate to the next level.Sudoku professor Frank Longo has crafted five books with 300 sudoku each, which will take students from solving basics to super-hard, super-expert strategies. Try them and see how far you can go!Things are getting tough here! Now solvers can put their skills to the test with 300 medium-hard to hard puzzles. By the end of the book you’ll be working on upper-level techniques. Show more