Just when you thought it was safe to pick up a pencil Killer Su Doku is based on the original Su Doku grid, with the same rules and numbers—1 to 9—but with an added deadly twist. This time there is an element of arithmetic involved and there are few, if any, clues. The aim is to not only complete every row, column, and cube so that it contains the digits 1 to 9, but to also fill in the outlined cubes so they add up to the same number. Hints to solve the puzzle are hidden in the joined squares where only one combination of numbers applies. In the case of joined squares, if the printed number is 3, it should be 1 and 2 that go into the squares. Likewise, in the case of three joined squares, if the printed number is 6, the only combination possible is 1, 2, and 3. To add one final fiendish level, each puzzle also has a time worked out by its Japanese creators so you can try to beat the clock.

Expert Sudoku is an all-new collection of handcrafted puzzles for the expert puzzle-solver. This is the book that challenges skilled solvers and Sudoku-lovers at the top level—every one of the 320 puzzles is rated "difficult." Good luck!

Looking for a different kind of Sudoku challenge? Then try this third volume of 3D Sudoku! These 101 Jumbo 3D Sudoku puzzles solve just like regular Sudoku puzzles, but now each 3x3 box is written on the face of a cube and the rows run in all different directions, bending back and forth with the contours of the stacked cubes. Perfect for Sudoku solvers of all skills, the puzzles are arranged in increasing order of difficulty throughout the book, but all of the puzzles are designed to be solved by simple logical deduction - absolutely no guessing is ever required!

You don't need to be a math whiz to enjoy a great sudoku puzzle! Sharpen your mind and have some fun with this great collection of sudokus, including over 540 challenges across four difficulty levels (Warm-Up, Challenging, Tough, and the ultimate Samurai Sudoku!) A must-have for all Sudoku enthusiasts. OVER 500 PUZZLES & SOLUTIONS: Hours of fun and entertainment to enjoy! VARIETY OF LEVELS: From levels 1 to 3 increasing levels of difficulty including Warm Up, Challenging and Tough. When you are done, test your skills on the ultimate Samurai Sudoku Puzzle - 5 puzzles linked together by a central puzzle! Can you become a master samurai? LAY FLAT: Spiral-bound lays flat for ease of use at home or on the go. Whether your drinking your morning coffee, riding on the train or relaxing on vacation this sudoku book can go with you. MAKES A GREAT GIFT: For the sudoku puzzle lover, this books makes a great gift for any occasion! Birthday, stocking suffers, road trip or more, everyone will love it! BRAIN BUSTERS(TM) Part of the Brain Busters Puzzle Collection from Parragon & Cottage Door Press. Look for other books including word finds, crosswords, picture puzzles, and more.

Can't get enough of Sudoku? This book is for you! It contains three hundred challenging and devilishly difficult Sudoku puzzles in a portable paperback. Features: - 300 hard Sudoku puzzles - Big grids for easy solving - Edited by legendary puzzlemaster Will Shortz

Best-selling author Al Sweigart shows you how to easily build over 80 fun programs with minimal code and maximum creativity. If you’ve mastered basic Python syntax and you’re ready to start writing programs, you’ll find The Big Book of Small Python Projects both enlightening and fun. This collection of 81 Python projects will have you making digital art, games, animations, counting pro- grams, and more right away. Once you see how the code works, you’ll practice re-creating the programs and experiment by adding your own custom touches. These simple, text-based programs are 256 lines of code or less. And whether it’s a vintage screensaver, a snail-racing game, a clickbait headline generator, or animated strands of DNA, each project is designed to be self-contained so you can easily share it online. You’ll create: • Hangman, Blackjack, and other games to play against your friends or the computer • Simulations of a forest fire, a million dice rolls, and a Japanese abacus • Animations like a virtual fish tank, a rotating cube, and a bouncing DVD logo screensaver • A first-person 3D maze game • Encryption programs that use ciphers like ROT13 and Vigenère to conceal text If you’re tired of standard step-by-step tutorials, you’ll love the learn-by-doing approach of The Big Book of Small Python Projects. It’s proof that good things come in small programs!

Master the Numbers Game That’s Taking the World by Storm Whether you’re one of the millions of people already obsessed with the number puzzles called Sudoku (a Japanese logic game that’s like a combination of a crossword puzzle and a Rubik’s Cube) or you’re just being introduced to this addicting game, Master Sudoku has a puzzle for you. Here, the UK’s leading Sudoku expert, Carol Vorderman, offers 200 puzzles for Sudokuists at every level, ranging from easy to super difficult, with clear instructions and crucial secrets that will help you finish puzzles in record time. The faster you are, the higher your score! Engrossing, challenging, and totally addictive, Master Sudoku is chock-full of fun.

Compiled by the creator of the bestselling Book of Sudoku, Kakuro is the hot new puzzle craze sweeping the UK and now the US. The First Book of Kakuro includes 200 puzzles ranging in difficulty from the gentle through the tough to the diabolical. Fans of Sudoku are nuts about the challenge of Kakuro because it presents new challenges. If completing a 10 x 12 cell grid becomes a breeze, simply move on to bigger puzzles.

The New Video Game Idea Book is a book that gives game makers ideas for a great new video game. It does so by giving the game maker new and old ideas to work with. It also goes over the philosophy of what makes a good video game, helps the game maker's imagination, shows them their options, and goes over the best methods for making a new video game. This is a helpful public domain book for making good video games.