Books like Rebecca's world by Terry Nation

Rebecca, a child from Earth, is mysteriously transported to a distant planet as she looks through her father's astral telescope. There, she meets three very bizarre characters: Grisby, a character with the most painful feet in the universe; Captain 'K', a reluctant and bespectacled superman; and Kovak, an unemployed spy known as the man of a thousand faces - all of them embarrassingly alike. She meets the sinister and smooth-talking Mister Glister, and his two henchmen, Lurk and Cringer. And she comes face to face with the evil GHOSTS who control the planet. Rebecca's new friends tell her about the legend of the GHOST tree and its strange power over the GHOSTS. They explain that if the tree could be found, the GHOSTS could be banished forever. The only trouble is the tree is located somewhere in the heart of the Forbidden Lands - a dark and mysterious region filled with weird creatures and hidden perils - where no one has ever dared to venture. Rebecca persuades her three companions to go there with her. Their exciting journey, with its dramatic climax, is the story of Rebecca's World.

First publish date: 1975