A good intro for beginners.
The theory of lock picking is the theory of exploiting mechanical defects. There are a few basic conept and definitions but the bulk of the material consits of tricks for opening locks with particular defects or characteristics. The organization of this manual reflects this structure. The first few chapters present the vocabulary and basic information about locks and lock picking. There is no way to learn lock picking without practicing, so one chapter presents a set of carefully chosen excerses that will help yuou learn the skills of lock picking.