The Wanderer
Fritz Leiber
 The novel is set in a future a few decades ahead of the 1960s, when it was written. The USA is still competing with the Soviet Union. Both have functioning bases on the Moon, and the Soviets have gained the lead in sending an expedition to Mars. From the point of view of most of the population of the Earth, a new planet appears out of nothing close to the Moon, shortly after a total lunar eclipse. Over a period of few days the planet appears to consume the Moon. On Earth, the new planet's gravity causes death and destruction as it raises huge ocean tides and causes earthquakes and volcanic eruptions. Flying saucers appear in the skies, apparently trying to mitigate some of the disastrous effects. Then after a spectacular battle in space between the new planet and another, the skies are empty again. Earth is left without a Moon. The novel follows the lives of people around the globe. There is a man attempting a solo crossing of the Atlantic ocean, a smuggler operating off the coast of Vietnam, two friends in England, a trio of drug addicts in New York City, and the military controllers of the USA Moon mission, deep in a bunker somewhere near Washington DC. The new planet is referred to by everybody as simply "the Wanderer". The main protagonists are three longtime friends. Paul Hagbolt is escorting Margo Gelhorn (and her cat, Miaow) to observe the lunar eclipse at an observatory in California. Their friend, and Margo's fiance, is Don Merriam, one of the American astronauts at the Moon base. Following on a whim a sign advertising a "flying saucer symposium", Paul and Margo fall in with a group of intellectuals, dreamers, charlatans and misfits. At that point events overtake them. The new planet appears and triggers an earthquake that buries their cars in a landslide. They must avoid tsunamis, more earthquakes, roving mobs and flying saucers to survive. On the Moon Don Merriam is the only one to escape the destruction of the moonbase. He tries to take off in one of the base's spaceships, only to fall through the Moon itself as it splits into two under the influence of the new planet. His ship is eventually captured by the inhabitants of the new planet. Events take a bizarre turn when the group of saucer enthusiasts is faced with a tsunami. A flying saucer appears, and a cat-like being uses some kind of gun to repel the waves. Then the being uses the same device to pull Paul, who is holding Miaow, into the saucer. At the same time the gun falls into the hands of the people on the ground. In the saucer Paul meets a being calling itself Tigerishka. A large, female telepathic feline creature, she initially mistakes Miaow as the intelligent being whose thoughts she can hear, and Paul as a "monkey". Realizing her mistake, she regards Paul with contempt. Monkey-beings are not well regarded by her people. However she slowly warms to him, and explains why her planet has appeared to consume the moon. Like many of the human characters, her people are intellectuals, dreamers, charlatans and misfits. They belong to a culture that spans the Universe, has achieved immortality, and can construct planets and traverse hyperspace. They can create bodies for themselves that reflect the origins of their races, such as Tigerishka's cat-form. However they are fleeing their culture's police. Their culture rejects nonconformists, instead devoting itself to ensuring that intelligent life survives to the end of time. Tigerishka's people want to explore hyperspace, and tinker with space, time and the Mind. Their flight has brought them to Earth orbit simply to refuel. Huge amounts of matter must be converted to energy to power their hyperspace drive and their weapons. As alien as Tigerishka is, Paul becomes besotted with her. Tigerishka eventually yields to his advances. At the same time, Don Merriam has been rescued with his ship by the Wanderer's other spaceships. He is reunited with Paul aboard Tigerishka's ship. Now they must testify in the Wanderer's trial, for the police have arrived. A second planet, "The Stranger", colored a dull gray where the Wanderer is bright purple and yellow, appears and threatens battle. Don and Paul give their testimony as to the good treatment they have seen, along with thousands of other humans appearing by some kind of holographic projection. However the trial goes badly. Paul and Don are evacuated in Don's ship, placed into position close to Earth by Tigerishka. Tigerishka takes Miaow with her back to her planet. Then the final battle takes place, and both planets disappear. In the final scene, Margo and her companions walk to Vandenberg Spaceport as Don's ship comes in to land.