The fifth (although listed at sixth) book in a series that is only related by the fact they are all set in a world where everyone who doesn't have the 'O' blood group has died and so far my second favorite after "School's Out".
Now the premise of this one is out there on it's sleeve. It's basically a retelling of the Robin Hood legend, with all the elements that go with that, but with some nice twists. What's more it doesn't try to hide what it is, or try to be overly clever, even if there is some avoidance of mention the actual name "Robin Hood", no doubt as a sort of in joke by the author.
Plot wise, it's pretty good, although a couple of points are stretched to fit the legend, nothing is as far fetched as some of the other books in the series.
The Characters are good, nicely drawn without it being overly obvious who they are in 'legend' terms, and updated in good ways.
All in all a good fun read, very nicely done.