If you are someone who prefer to begin with practicals instead of mugging up theoretical lessons, then these ebooks are for you. These free guides shares tips and tricks that help you gain hands on experience on hacking. 1. Hacking Gps The book carries Crazy-cool modifications include exploiting secret keycodes, revealing hidden features, building power cords and cables, hacking the battery and antenna, protecting a GPS from impact and falls, making a screen protector, and solar-powering a GPS. It is a user manual that shows the reader how to modify, tweak, and hack their GPS to take it to new levels! 2. Hacking Google Maps and GoogleEarth The introduction of the book says, "This one-of-a-kind resource contains 500 pages of jaw-dropping hacks, mods, and customizations. These include creating mashups with data from other sources such as Flickr, building a space station tracker, hacking Maps with Firefox PiggyBank, and building a complete community site with M...