Major Inapak the Space Ace #1

The Master Rocketeer relates a story to children. In 1982, just as the East and West blocs were about to attack each other from space, Earth was threatened from the Moon. Robin stowed away in a repurposed attack rocket in which Major Inapak was sent to investigate. They found the Earth under attack from a previously unknown planet, hidden behind the Moon. With the help of a friendly lunar creature, they reversed the planet-destroying weapon, wiping out the attackers, and returned to Earth.