Stig of the Dump
Stig of the Dump was a children's book published by Puffin Books in 1963. It was about a boy, his caveman friend, and time travel to the Stone Age. Claire Billings ordered it as a Christmas present for her older son Gerry as he had been talking about cavemen recently — unbeknownst to his family, he had developed a psychic link to the Doctor's TARDIS and had witnessed the First Doctor's encounter with the Tribe of Gum.
Gerry thanked his mother for the book and began reading it, leaving Claire relieved that it had been a good choice. She was later puzzled when Gerry looked up from the book and commented "That's not right", as the story was supposed to be fiction. (PROSE: Imaginary Friends [+]Loading...["Imaginary Friends (novel)"])