http://www.lysator.liu.se/mit-guide/mit-guide.html
This site offers a fully-hypertexted guide on picking locks. It covers several different types of locks, from the standard pin and tumbler kind to more complex and difficult to pick locks. Users will find detailed diagrams and exercises to follow in order to master the art. There are also sections which cover more advanced lockpicking topics such as vibration picking, as well as a section that reviews legal issues. Finally, this guide has information on how to build your own lockpicking tools.