A military scifi classic, by one of the modern masters of world science fiction.

A military scifi classic, by one of the modern masters of world science fiction. Reads L to R (Western Style).

More than thirty years ago, a hyper-dimensional passageway suddenly appeared over the continent of Antarctica. Fighters from the mysterious alien force known as the JAM poured through the passage, the first wave an attempted terrestrial invasion. Their ferocity was unquestionable, their aim unknown. Humanity, united by a common enemy, managed to repel the invaders, chasing them back through the...