This Halcyon Classics ebook is THE MAD PLANET, an early pulp science fiction novel by acclaimed science fiction/mystery writer Murray Leinster (William Fitzgerald Jenkins). Leinster (1896-1975) was a mainstay of the pulp magazines of the 1920s and 1930s, and following World War II he broadened his audience by writing for Radio, Television, and Hollywood. Among his accomplishments, Leinster is credited with popularizing the notion of parallel universes and the concept of the internet.

In science-fiction, as in all categories of fiction, there are stories that are so outstanding from the standpoint of characterization, concept, and background development that they remain popular for decades. Two such stories were Murray Leinster's The Mad Planet and Red Dust. Originally published in 1923, they have been reprinted frequently both here and abroad. They are now scheduled for book publication. Especially for this magazine, Murray Leinster has written the final story in the series.