After 150 years of peace on Earth the unarmed Interstellar Exploration Ship, the "Highway to Heaven" is attacked without apparent provocation by unknown aliens with much more advanced technology than the Earthmen. This book and the two other in the War and Space Trilogy are an attempt to look more logically at War between space faring races and considers the question whether war is even possible without both sides becoming extinct. The Three books of the trilogy are also available as a single volume. Although this book includes the use of space weapons, it is not a conventional space war book.