My Best Mathematical and Logic Puzzles (Math & Logic Puzzles)
by Martin Gardner
from Dover Publications
Sudoku: Medium to Hard
by Zachary Pitkow
from Chronicle Books
Sudoku craze and pairs the addictive logic-based game with a spectacularly handy format. Filled with 200 grids of varying difficulty, our pocket-sized hardcover notepads are perfect for strategizing on the bus or train. Now that's what we call a smart calculation!
Mensa Guide to Solving Sudoku: Hundreds of Puzzles Plus Techniques to Help You Crack Them All (Mensa)
by Peter Gordon
from Sterling
Easy Origami
by John Montroll
from Dover Publications
Origami Paper: 24 7" x 7" Sheets in 12 Colors (Origami)
by Dover
from Dover Publications
Are You Smart, or What? A Bizarre Book of Games & Fun for Everyone
by Pasqual J. Battaglia
from Intl Puzzle Features
Are You Smart, or What? is the most entertaining book of word games, ever! It combines clever challenges and surprising answers with playful innovations to both amaze and amuse readers of all ages. All puzzles are concise and uncomplicated. They are about ordinary words and things that everybody knows about so the entire family can enjoy them.
Killer Sudoku 1: The Deadly New Dimension
by Collins Uk Staff
from Collins
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 numbers1 to 9but 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.
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