Remnants is a science fiction book series authored by K. A. Applegate. It is the story of what happens to the survivors of a desperate mission to save a handful of human beings after an asteroid collides with Earth. Eighty people are placed aboard a converted space shuttle using untested hibernation technology and fired blindly into space hours before all life on Earth is obliterated by a large asteroid called The Rock. They are then picked up by a large, sentient space craft of monumental proportions known as 'Mother' which is inhabited by various races. 'Mother' can manipulate the physical environment within the craft's limits and often does so. Only a few people placed in stasis actually were alive and capable of being reanimated when they reached 'Mother'.

Eventually, the Remnants fight through what they call the Riders, primitive warriors, and the "Blue Meanies", creatures engineered to care for mother, to the bridge, where The Baby of Tamara Hoyle is revealed as Te, a Shipwright, one of the beings who created mother. A battle of wills between Te and Billy Weir commences, with Billy emerging as the victor to assimilate Mother and take control of the ship, forcing the 3 races to co-exist. With an uneasy truce settling in among the 3 races, two figures make bids for power: 2Face and Yago. While 2 Face gets closer to Billy, Yago encourages several of the Blue Meanies to worship him over Mother. As well, Jobs discovers the remains of Earth. But returning to explore would violate a rule of the truce: not altering Mother's course. After several fights with the Blue Meanies due to Yago's actions, the truce is broken and the Remnants head for Earth.

Over the course of the 6 months it takes for Mother to reach Earth, a new threat emerges: Amelia, Charlie, and Duncan. Although they appear human, they have somehow evolved in ways never before seen, even thought the Remnants have seen various mutations in their own. The 3, which come to be referred to as The Troika, declare themselves Billy's enemies, even initiating an attack on the Remnants. Yago eventually forges an alliance with the Troika with one goal in mind: end Billy's control of the ship.