** spoiler alert ** 
 A little short, even for a graphic novel, but it still packed in a good bit of back story and some unexpected plot twists. 
 The author, Zack Whedon, wrote in the after-notes that the book was written from an outline by Joss. Presumably, this would have eventually been a TV episode in the series if it hadn't been prematurely cancelled. 
 However, it absolutely does not explain why Shepherd Book was rushed to surgery on the Alliance cruiser in "Safe." 
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 If Officer Book was summarily discharged following a devastating loss, why was he greeted aboard the Alliance cruiser with open arms then given free passage afterward? And if he was a browncoat spy who caused that devastating loss, then why did he not rejoin the resistance afterward? 
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