War in Outer Space, The (Tom Swift #4) by Victor Appleton - Vintage Paperback

When Tom builds the marvelous new hyper-drive spacecraft, Exedra, he zooms off to a distant part of the galaxy and <a dangerous, challenging adventure.

With his friends, Ben and Anita, and his trusty robot, Aristotle, Tom meets a peace-loving but frightened race of insectoids known as the Skree. When Tom learns that the intelligent Skree are being attacked by a vicious and relentless race of humanoids, the Chutans, he is determined to help them.

Tom and his friends face almost certain death as they fight to save the earth from destruction!