Author, Andy Lloyd, demonstrates in his book, The Dark Star that a planet beyond Pluto need not be cold and lifeless! He says that astronomers know this. This is not controversial for them. They understand what brown dwarfs are, and they realize that they provide enough heat and light to provide habitable environments on planets orbiting these failed stars. Lloyd says that one might well be circling the sun, in the comet clouds that make up the bulk of the solar system's volume. The book recognizes the difficulties that detecting such a body present, however, Lloyd puts forth a convincing argument with 332 pages of research, 41 pictures and graphics, hundreds of scientific references, and a complete index of terms and names that Planet X exists!