One of the big surprises of the TV year 2023 was the Apple series "Silo". As I discussed in detail with Sean T. Collins on the podcast, the series impresses with great worldbuilding, strong characters, and great acting performances. The structure of the story and its pacing are also great, in short: highly recommended. I only learned after watching the series that it is based on a book (I should have paid more attention to the credits). This book had a similar story to "The Martian": it originally started its career as an online novel, was then discovered by a publisher, and turned into a bestseller. In Howey's case, it was the first chapter, initially intended only as a short story (and which forms the first episode of the series), that was published online and from which the rest of the book was developed. How it compares to the series and whether it can convince as an independent work will be shown in the following review. Warning: I spoil the story and thus also large parts of the series.