Both of the other EDM?books we offer - Build an EDM and The EDM How-To Book,  have been consistent sellers, and if you just want an EDM to remove the occasional broken tap or drill,  are just the job. But if you want a machine capable of much finer work, which can be used to burn reverse artistic images into tool steel for moulds, or the like, then you need a Pulse EDM, in which the spark is controlled by a timer and power Mosfets. Normally only available as very expensive complete machines, here genius Ben Fleming describes how you can make your own Pulse EDM at reasonable cost. You will have to have some electronics knowledge (or acquire it), as well as mechanical engineering ability, but this is a great project. 128 page large format paperback, full of drawings, schematics and B&W photographs.