I very much enjoy your codewords - the best Ive found. I suffer a lot of long-distance flights and they are perfect to while away the hours between London and Sydney! Richard Im in crossword heaven. You are such a challenge but great. I am a retired teacher and my brain screams for challenge. I have at last found it. TV, etc. is no challenge, nor does it satisfy the inquiring mind. My son-in-law gave me a codeword book and they are not nearly as good as yours. Thanks so much Catherine, you are a great detective! Felicity I really enjoy the challenge your puzzles give me. Chantelle Acknowledgements: Ian Porter, Lorraine and David Hughes, Joan Kelly, Margaret Campbell, Allan Went,Wes Towers www.omnificdesign.com.au

The Mammoth Book of Codeword Puzzles is a truly bumper collection of these hugely popular puzzles - also known as codewords, cipher crosswords and cipher word puzzles. There are also some fun variations in the form of dropouts, keywords, coded quotes and long diversions. In a codeword puzzle, each grid is made up of numbered squares, with each number corresponding to a letter of the alphabet. A few letters are given, but the rest must be discovered by using logic and word power to crack the code. HOURS OF STIMULATING PUZZLE FUN!

Perfect for coffee breaks, commutes or relaxing at home, this bumper collection of 300 brand new codeword puzzles is guaranteed to provide you with hours of entertainment. The book is arranged into easy, medium and hard puzzles and each puzzle is presented in a 13 x 13 grid on its own page. Printed in a portable paperback format meaning it can be taken with you on your travels or sit neatly on your bedside table.

Fun Codeword Puzzle Book for Adults - Can you crack the code? Codeword puzzles are similar to crossword puzzles: The difference is that there are no clues provided. Instead, every letter of the alphabet is replaced by a number from 1-26. For instance, the letter "F" might be replaced by number 15 and the letter "R" by number 4. And your task is to crack the code by figuring out which letter is represented by which number. Happy code breaking! Key features of the puzzle book: 120 Codeword Puzzles Book size: 8,5 x 11 inch (ca. DIN A4) Including instructions Solutions at the back of the puzzle book The codeword puzzle book is the perfect gift for adults and seniors who love brain jogging and mental excercises.

Codeword Puzzle Book for Adults Codewords (sometimes called Code Breakers) are like crosswords with no clues. Instead, every letter of the alphabet has been replaced by a number, all you have to do is decipher which letter is represented by which number. This Codeword Puzzle Book is a fun way for teens, adults or seniors to sharpen their minds and test their Logic Skills. Including 90 Puzzles to keep you entertained for hours. This is the UK English Spelling version. Codeword Puzzle Book Features: Loads of Puzzles: 90 Pages of Puzzles Suitable for Most Levels: Medium to Hard Difficulty Perfectly Sized - 7" x 10" Solutions Can be Found at the Back of the Book Premium Matte Color Cover Puzzle King Publishing: Puzzle Books for Everyone!

A manual on protecting CDs against illegal copying, this book shows how crackers copy CDs using various access methods. The methods covered include the CDFS driver, cooked mode, SPTI, ASPI, the SCSI port, and the MSCDEX driver. Explained is how to prevent cracker break-ins using protections based on nonstandard CD formats such as the CD driver and weak CD sectors. Information on CD functioning fundamentals and tips related to CD protection in a format free of math and assembling-such as data formats, the scrambler, the Reed-Solomon coder/encoder, the CIRC coder/encoder, and a weak-sectors generator-are also provided. The main program interfaces, which provide direct control via peripheral devices on the application level in UNIX, Novell, and Windows 9x/NT/2000/XP, are considered, as is how to read and write RAW sectors.

This text offers an introduction to error-correcting linear codes for researchers and graduate students in mathematics, computer science and engineering. The book differs from other standard texts in its emphasis on the classification of codes by means of isometry classes. The relevant algebraic are developed rigorously. Cyclic codes are discussed in great detail. In the last four chapters these isometry classes are enumerated, and representatives are constructed algorithmically.