PENGUIN ORANGE SPINES : THE PENGUIN SUDOKU CHALLENGE PB – DAVID J. BODYCOMBE

"Welcome to The Penguin Sudoku Challenge: with 1 sudoku puzzle for every day of the year 2 challenge you in every way on 3 different levels – beginner, moderate and fist-clenchingly tricky. Perfect 4 sharpening your brain and honing your logic, sudoku will give you a 5 star brain (if they don t hit you for 6). In 7th heaven when you complete them, you ll 8 giving up on any of these – but those 9 by nines won t complete themselves… Good luck!"