Chocky
John Wyndham
 Many children have imaginary friends but one father becomes rather concerned that his son, Matthew, is a bit old to have one. His concerns deepen as his son becomes increasingly distressed and blames it on arguments with this unseen companion. As the story unfolds, it becomes clear that the friend is far from imaginary, but is an alien consciousness communicating with Matthew's mind—a fact that is of intense interest to shadowy government forces. Chocky reveals that it is a scout sent from its home planet (where there is only one sex) in search of new planets to colonise. Chocky, talking "through" Matthew, to his father, David Gore, explains that in saving Matthew from a recent accident it has violated the rules of its scout mission (interfering with events on Earth) and must end its link with him completely. Its further work on Earth will be conducted in a much more covert manner.