Calcu-doku has taken the puzzle world by storm, providing solvers with many happy hours of logical thinking and simple mathematics. Now, world sudoku champ Thomas Snyder takes it to the next level. He ups the ante by incorporating unique themes into the mix: so your starting numbers might be in the shape of a smiley face, or the secret to solving might revolve around the number 5. Snyder has pulled out all the stops-and created a compelling, captivating, and creative variation on Calcu-doku.

The Art of Puzzles is a collection of mental masterpieces from the world's most talented puzzle designers. With ten genres of logic puzzles and over 270 puzzles in total, this book has a great mix of challenges including shading puzzles (Tapa and Nurikabe), loop puzzles (Masyu and Slitherlink), number placement puzzles (Skyscrapers and TomTom), object placement puzzles (Star Battle and Battleships), and region division puzzles (Cave and Fillomino). Each section has a mix of very easy to fiendishly hard puzzles, with hints for every puzzle to help you to become a better logic puzzler.

What does the Global Positioning System and smartphones, iPad, or wearable devices, these fabulous gadgets that lets its users know their exact location anywhere on Earth, in the air, have in common with Sherlock Holmes? This guide book shows how even an advanced and baffling concept like GPS can be explained through the same logic that lets Sir Conan Doyle’s famous detective solve crime.

Packed with 200 of America's favorite crosswords, this volume includes five never-before-published holiday-themed puzzles.

A madcap collection of puzzles and word stories from puzzle nut and TV's Dictionary Guy, David Astle.

This book discusses secularization, arguing that it may be more complex and significant than is generally recognized. Using a number of online exploration methods, the author provides insights into how religion may be changing, and how information technology might be energized in this process. Working from the premise that the relationship between science and religion is complex, the author demonstrates that while science has contradicted some specific religious beliefs, science itself may have been facilitated by beliefs formed many centuries ago. Science assists engineers in the development of powerful new technologies, and asserts that the universe is based on a set of fundamental principles that can be understood by humans through the assistance of mathematics. The challenging ideas discussed will benefit readers through sharing a variety of Internet-based research methods and cultural discoveries. The book provides a balance between quantitative methods, illustrated by 24 tables of statistics, and qualitative methods, illustrated by 30 screenshots of computer-generated virtual worlds. Analysis interweaves with description, creating a sense of involvement in the experience of exploring online realities at the same time as radical insights are shared.