What is a Transformer? "A toy that through a series of changes can alter its form from a vehicle to a robot." This ground-breaking book, now in its new and improved second edition, presents these incredible changing figures of the 1980s and '90s in over 500 color photos with descriptions and an up-to-date price guide. The history of these toys is presented, from the early Diaclone, Diacrone, and Micronautsof Japan through the emergence of Hasbro's Transformerscreations to the Transmetals and Fuzors of the late nineties. This immensely popular guide belongs in the library of every action figure collector.