For twenty-five years the colossal battle between Megatron and Optimus Prime has captivated Transformers fans around the world. Yet the full story of the conflict between the two most famous Transformers-everything that happened before Optimus and Megatron arrived on planet Earth-has always been a mystery . . . until now. Here, for the first time told in its entirety, is the thrilling saga of Optimus and Megatron before they were enemies, before they...