Learn how to program in Python while making and breaking ciphers—algorithms used to create and send secret messages! 

After a crash course in Python programming basics, you’ll learn to make, test, and hack programs that encrypt text with classical ciphers like the transposition cipher and Vigenère...

In these Messenger Lectures, originally delivered at Cornell University and recorded for television by the BBC, Richard Feynman offers an overview of selected physical laws and gathers their common features into one broad principle of invariance. He maintains at the outset that the importance of a physical law is not "how clever...

Greasemonkey Hacks is an invaluable compendium 100 ingenious hacks for power users who want to master Greasemonkey, the hot new Firefox extension that allows you to write scripts that alter the web pages you visit. With Greasemonkey, you can create scripts that make a web site more usable,...

100 do-it-yourself simple projects, requiring only basic tools, precut lumber and standard materials.

Build fashionable, functional, inexpensive indoor and backyard furniture—even if you're a complete beginner. These are realistic projects for the average weekend warrior that require no great skills, just normal...

Bestselling personal development author Gill Hasson is back with this pocket sized guide to dealing with your emotions. Learn how to understand yourself and those around you with practical tips and tricks that will help you be more...

This book is intended to be accessible to undergraduate students with two years of typical mathematics experience, most likely meaning calculus with a little linear algebra and differential equations. Thus, specifically, there is no assumption oLa background inabstr&;t algebra or number theory, nor of probability, nor of linear...

But people are clever. They tinker and...