I picked up this book from the "give away" pile at home to read on a horrendously long plane ride and I found it so engrossing that I couldn't put it down. It is incredible how the story makes the characters human enough to create sympathy and interest in the reader and yet they remain true to their species, so they do not seem "humanized". The characters are dynamic, learning from each other and from their circumstances, gaining maturity and wisdom. There is a good balance between developing the plot and description (necessary for the reader to understand the dynamics of rabbit communities and to appreciate how rabbits view the world). I found the rabbit mythology, their own form of religion which reminded me of the greek myths, fascinating. These "myths" were very naturally woven into the plot, stories that rabbits told each other to amuse, inspire, distract.
I suppose the most unbelievable part of the book, is the fact that despite facing the most dire circumstances, none of the main characters die (only peripheral ones do). I was also disappointed that there were few, if any, memorable female characters (though the lack of females in the community drives the plot in the latter part of the book, so I suppose females are not entirely marginalized, but they are objectified).
One might think a book about rabbits as just "fluff" (no pun intended), but this story explores so many important themes: vision, loyalty, courage, faith, being true to oneself, acceptence of others/cooperation, etc. I think the animal element would appeal to children, yet the content of the book would be equally interesting for an adult.