One third of Wi-Fi Toys is available for download as PDF or adapted for the web. If you're new to Wi-Fi, Chapter 1 is a great start. Even if you don't want to make your own cables, it gets you quickly up to speed on why good cables makes all the difference.
All the other projects are great fun and useful too!
Chapter 1, The basics and making a cable
Chapter 3, Build a Wi-Fi cantenna
Chapter 5, Wardriving intro, setup, and discovery
Chapter 11, Citywide games using Wi-Fi Access Points
Chapter 13, Go long with Wi-Fi (10 miles or more!)
Find them all in the Contents.
