This week, we tackle a book that promises a lot more Joanna McCoy than it delivers. Plus: malfunctioning computers, antimatter holocaust, Uhura at the conn, and enough product placement to make an Adam Sandler film look like a paragon of subtlety. It’s Crisis on Centaurus, or, Mission to the Planet That’s Basically Earth But the Title Crisis on Earth Isn’t As Catchy or Compelling or Alliterative.