Impenetrable novella full of clunky dialogue, conspicuous exposition, inconsequential action and flat, lifeless characters. The author seemingly has no grasp of narrative perspective, hopping the POV between the two main characters of Jack and his Soviet-cliché counterpart Vladimir, nor of natural speech. As an example, here's a dynamic exchange between the two, upon discovering a mysterious signal and digging a hole to find its source.
"I bet my back will hurt tomorrow," he said, almost triumphantly. "Like I did some real good gardening work. This is fascinating, but I'm afraid that we will have to get back to the station. It doesn't look like we will solve this enigma today."
"Yes, you are right," Vladimir said, but Jack couldn't tell if his comrade was only tired or frustrated.
What drama!
In an effort to crowbar some emotional backstory into the story, Schulze-Makuch commits the notorious crime of characters telling each other what they already know, in an astonishing example of "As you know, Jack". Here Vladimir is telling Jack why Jack's wife wants a divorce:
"We discussed this before. You made the choice to become an astronaut rather than settling down into an established life with her."
In the end, an unreadable mess that otherwise might have contained some interesting ideas.