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Secret codes are the best fun! This book includes lots of space to write your secrets. If you want to keep your secrets really secret the pages at the back of the book will show you four different ways of making secret codes.
Verlagsinfo: The Divine Proportion reveals a number of simple patterns: It is seen in the seed patterns of fruits, the family tree of bees, the pyramids of Egypt, Gothic cathedrals, Renaissance paintings, the human body, shells ... the list is endless. Mathematicians use the Greek symbol to represent the Divine Proportion and equate it to a number that is defined by the ratio (1 + 5) / 2 or 1.6180339.... Numbers do little, however, in describing this unique ratio that is found everywhere in nature and for 2500 years has been an aesthetic guide in art and architecture. Beginning with calculations found on clay tablets in ancient Babylon, the story of Divine Proportion can be traced alongside the history of numbers to the fractals of the digital age. As its many forms unfold we uncover the Golden Rectangle in the Parthenon, Golden Spirals in the human inner ear, a Golden Angle in the petal patterns of a rose, and the Fibonacci numbers in lilies, daisies, pineapples, and in our own DNA. With its natural balance and elegant beauty, the Divine Proportion is a perpetual reminder that our hope for regeneration and continuity lies in realizing the meaningful and harmonious relationship of all the parts to the whole. This book deals with the Divine Proportion, a secret code that rules art, nature, and science. It is known by many names: Golden Mean, Sacred Cut and Phi are only a few; and it is not by chance that the Divine Proportion was given its name. It has been called divine because over thousands of years it has been deemed to be so.
Teen-agers searching for a treasure hidden at an old farm find a secret message written in code.
"Can a secret code help save someone's life? Find out as you read about Kathryn's adventure in the Arizona desert."--
Presents history, trivia, and code-breaking tales in a guide book to the world of secret writing that includes examples of a variety of codes and ciphers.
Presents a variety of codes and ciphers and includes messages to encode and decode
Oscar, who is blind, teaches Lucy how to read his Braille book.
The Secret Code Book is a short introduction to substitution ciphers. The chapters ease young readers into the concept of rotation ciphers and work their way up to the Vigenère cipher. Along the way, readers will also learn about geometric approaches to secret codes such as the Pigpen cipher. As a bonus, there is a brief description of frequency analysis and how it is used to crack secret codes. frper gpbqr obbx In addition, this book actively challenges readers with practice missions where answers are listed in the back. Also, there is a cut-out rotation template that is provided to make your very own cipher disk! After reading this book, you will have all the basic tools needed to create secret messages.
This is a journal with a secret code alphabet. It is for you alone or for you and a friend. The first pages there the secret alphabet is written and you can cut it out to keep it in a secret place. On the following pages you can cut out two maps so that you know where you have hidden the secret codes. In the rest of this notebook you can write down all your secret thoughts. This is a journal for boys or girls who loves adventures. Be your own Sherlock Holmes or detective, or secret agent or just write down all your secrets, so that you only know how to decipher them. The format is 6.69 x 9.61 inches. You can therefore also write a lot in it. Make your boring life extra exciting with this journal, do-book or whatever you want to call it. Also nice to give as a birthday gift or just as a gift for another children's party. The kids will like it very much.
A brief look at various codes used through history to send and receive secret messages.