This, the third installment of Bill the Galactic Hero, is by far the most pointless (or least pointed, depending on your point of view) yet. Among the disparate sci-fi references are Star Trek: TOS, Han Solo & Chewbacca, time travel, cyberpunk, and likely several others. Any one or two of these could be utilized in a first-rate parody - but that book would be a distant cousin several times removed from this book. What we have here, instead, is a hodge-podge of tangential references that momentarily amuse (if that) but come nowhere near providing a satisfying story. If you're a fan of the printed word you might like this book, because that's really all it amounts to: words printed on paper with the usual punctuation thrown in to form sentences. There's a vestigial plot, an intrusive narrative structure, faux profanity, alleged sex, and such low-grade humor that the puns in Book 2 seem like Mamet in retrospect - all of which I'm sure appeal to some audience out there, I just don't think I'm a part of it anymore.
Most of my frustration with the book is that plot points are raised, but never go anywhere. For instance, we are presented at one point with the Alterna-Crew of the USS Enterprise (cleverly renamed here the Gumption) from the "Mirror, Mirror" TV episode. We encounter them once, and they're referred to a couple more times, but nothing actually happens with them beyond getting Bill from plot point 1 to plot point 1.1 - and we really could have gone from point 0.9 to 1.2 and never noticed anything amiss. Likewise, we're told that the Alien Historian is trying to alter the past to create a future without war - and that he's succeeding; but we never encounter a single instance of an altered timeline as we travel from cover to cover. If these were isolated instances Harrison and Sheckley might be forgiven, but nothing of consequence ever takes place in the book and large sections could be removed without affecting the story on either side of it.
If you have a few hours to kill and are given the choice between reading this book or taking up self-dentistry, check to see if you'll get any anesthetic first. You won't want to read this book without it.