Anyone whos a nitpicker for Hollywood space physics will instantly love the action of Campbells space battles. The lag between communication and observation, the reletavistic effects on firing and navigation, not to mention the nail-biting atmosphere of "Are we dead but just haven't gotten the memo yet?"
And the drama fan will love the chracters. While a sparse handful are a bit cookie-cutter: The blowhard eltist antaganistic ship captain, the cold, calculating bueracrat, the characters in Fearless do what very few sci-fi characters mangage nowadays, and seem like real people. They grow, evolve, and learn.
Last but not least, the odd Horatio fan will love the main character. Although his flying-by-the-seat-of-my-pants style starts to get a bit grating, especially since he's managing to do almost anything but, Captain Jack Black's intelligence and wit, not to mention his sense of (gasp!) morals and ethical rules of war, would find a welcome home in fans of almost any genre