1 puzzle per page. The book presents sudoku puzzles: 30 Samurai hard levels; 30 Samurai extreme levels; 30 Calcudoku hard levels; 30 Calcudoku extreme levels. Samurai sudoku may be called or searched with the following phrases or names: gattai sudokusudoku, sudoku puzzles, sudoku game, sudoku extreme, sudoku hard, play sudoku, sudoku high fives, sudoku books, super sudoku, multi sudoku, simple sudoku, samurai sudoku book, sudoku puzzles hard, sudoku grid, sudoku very hard, sudoku 5, sudoku puzzels, loco sudoku, large sudoku, 5 square sudoku, sumo sudoku, 5 sudoku puzzles, sudoku for kids, daily sudoku, big sudoku, game sudoku, sudoku tips, how do you play sudoku, how to do sudoku, sudoku with answers, sudoku puzzles very hard, how to play sudoku, 5 grid sudoku, sudoku board, sudoku answers, sudoku for dummies, irregular sudoku, five sudoku, sudoku tricks, sudoku rules, sudoku challenge, sudoku handheld game, how to solve sudoku, sudokus, sudoku puzzle solver, su doku, jigsaw sudoku, sudoku solution, play sudoku hard, sudoku for beginners, sudoku books cheap, sudoku solutions, mega sudoku, jigsaw sudoku books, sum sudoku, 5 in 1 sudoku, difficult sudoku puzzles, sudoku 9x9, sudoku levels, diagonal sudoku, pocket posh sudoku, difficult sudoku, ultimate sudoku, sudoku master, sudoku of the day, sudoku diagonal, extreme sudoku, super sudoku puzzles, mini sudoku, sudoku classic, sudoku hints, sudoku expert, monster sudoku, 5 star sudoku, five square sudoku, 5 sudoku puzzles in one, big sudoku puzzles, sudoku for children, what is sudoku, sudoku 5 levels, samurai sudoku puzzle books, butterfly sudoku, how do you do sudoku, sudoku mania, fiendish sudoku, sudoku killer, usa sudoku, sudoku au, usa today sudoku, killer sudoku, sudoku uk, sudoku evil, sudoku kingdom, how to sudoku, the daily sudoku, sudoku billions, 5 box sudoku, super easy sudoku, sudoku puzzles for kids, sudoku maker, how to solve sudoku puzzles, sudoku name, sudoku space, guardian sudoku, welt sudoku, sudoku game hard, live sudoku, blank sudoku grid, giant sudoku, sudoku triples, sudoku shoes, nyt sudoku, sudoku competition, math sudoku, spiral bound sudoku books, sudoku five star, sudoku variations, very difficult sudoku, universal sudoku, sudoku meaning, daily sudoku puzzle, how to win sudoku, today's sudoku, 5 by 5 sudoku, multi sudoku puzzles. Calcudoku may be called or searched with the following phrases or names: cendoku, calcudoku, kendoku, sudoku game, maths puzzles, kendoku puzzles, daily sudoku, mathdoku answers, calcudoku solver, mathdoku solver, sudoku puzzles, sudoku brainium, malacca, sudoku math puzzles, maze, mathdoku, mathdoku puzzles with answers, campo santo, jigsawdoku, futoshiki, inky puzzles, fantino, sparkchess, shabash, mandate, permainan sudoku, dkm shisen, sudoku sudoku, math sudoku, calcudoku answers, qonqr, beachball pop, mathdoku rules, card wars, newspaper maths puzzles, polar bear escape, mnemosyne, patrick min, sample sudoku puzzles, gametimer, japanese math puzzles, sudoku with friends, hidden ships, letter ladder, week end, jigsaw master, game like sudoku with math, mathdoku 9x9, sudoku hd, su du ku, real sudoku, ghetto crew, math puzzle games like sudoku, cijferpuzzel, sudoku countdown, math games like sudoku, infinity maze, andoku 2, blocked guy, name that tune, olivia chomentowska, math puzzles like sudoku, hitoshii, japanese math games, mighty fin, gomrath, medieval escape, megamaze, tap dash, how to play mathdoku, drop match, how to solve mathdoku, catch and match, triva, memory drop, kendoku solver, mini rpg, trak 4, tomtom puzzles, bug droppings, hidden tales, k doku, how to play calcudoku, doodle hunt, kendu solver. I hope you enjoy the book. I would really appreciate it if you write a review. Best regards, Basford Holmes