I recently read a book about the Voyager missions, specifically about the messages that are attached to the space crafts.
In this story a similar device is found, this one is from another universe. The outer message has been decoded and states that there are artifacts inside from the previous universe. These items can be retrieved but only by species deemed worthy.
Big topic, one that would need the space only a novel can provide.
I liked the story, even though it is not my cup of tea, too many aliens, too many "magical" technologies and the premise of a competition to determine who gets to look inside the probe, well it was a bit much to swallow. What I enjoyed most from this novella was the narrator, he was refreshingly irreverent and likable.
Even though I did not like the story itself I did enjoy how Vajra wrote. I would like to find more of his stuff, I think he could be an author to look for.
Rajnar Vajra's website is here although it is not dedicated to his writings: http://www.rajlessons.com/
To find out a bit more about his bibliography try going here: http://www.isfdb.org/cgi-bin/ea.cgi?15728