I stumbled upon 'The Red Planet' years ago in a used bookstore, the one with the faded cover of a lone astronaut. Finished it in one sitting, honestly. That ending though? Haunted me. The main character finally reaches the settlement, sees the Martian dawn, and then the transmission cuts off. I spent months scouring the internet, forums, old author interviews. From what I've gathered, it was always meant to be a standalone. The author, William Locke, passed away in the late 90s and his estate has been quiet. There's a lot of fan speculation and even some amateur-written continuations on obscure sites, but nothing official.
Sometimes a story is more powerful because it stops. The mystery of what happened next, whether the colony survived or if it was all for nothing, that's the point. A sequel explaining everything might ruin the bleak, beautiful ambiguity. I'd love more of that world, but I also respect a story that knows when it's over.
If you're craving similar vibes, 'The Martian Chronicles' scratches a different itch, and 'Red Mars' is more hard sci-fi colony-building. But for that specific, lonely tone, 'The Red Planet' is it.