Much like Orson Scott Card did when he revisited the events of Ender's Game from a different viewpoint with Ender's Shadow, John Scalzi uses the fourth volume of his Old Man's War series to retell the plot of The Last Colony. I like to think that Scalzi pulls it off better than even Card did, mainly because the whole same-story-from-different-perspectives thing works even better with first-person narratives, and Scalzi's narrators couldn't be much more different: a 90-year-old (mentally) ex-soldier, and—in this book—a 17-year-old girl.

It's the teenage-girl viewpoint that gets this book labelled as "YA", I guess, so it amuses me that it's by far the longest book in the series. (To be fair, the language is toned down considerably from previous books, but that comes from being about a bunch of teenagers instead of adults and ex-soldiers.) Speaking as a middle-aged dude, I think Scalzi pulls of the "voice" of a teenage girl quite well. And indeed, it's being able to connect with the main character through her narrative that makes this book work—even more than in previous volumes. Presumably you know the plot of the story already, having previously read The Last Colony, so that plot takes much more of a background role in this book, while the story here focuses more on the characters and their relationships with each other. And it works, it really does. Even when I knew what was going to happen, Scalzi keeps things fresh by not rehashing territory covered in the previous book; choosing instead to show what transpired in-between key events, or what Zoe was up to "off-camera".

Now, if you haven't read TLC yet—or previous books, for that matter—I think Zoe's Tale will work for you. Scalzi puts in enough detail, I believe, for the reader to make sense of what's going on. But I'll go out on a limb and guarantee that you will get much more out of this book having already read that one. Likewise, I find myself appreciating TLC much more now that I've essentially read it again, but from another perspective and with some of the gaps filled in. The two books together make for a more fulfilling reading experience than either one of them by itself.

It's not a perfect book by any means, but it's nice to get to know a number of characters better that were more or less peripheral in TLC, and to have some plot-related things explained a little better. And apparently Scalzi is incapable of writing something that's not an absolute page-turner.