Nice book about half a dozen-or-so foxes, who travel together on some quest.
It feels a bit open-ended (not as in "Open Ending - The End" but just the "Open Ending") but since it is a series, that makes sense.
For now, I'm giving it four stars while I read the next book(s), see if they really pick up exactly where this one left and such. When I'm finished I might update this review to reflect that.
But I can already say that this one kept me turning pages, wanted me to read on, so by that alone it's quite a good book at the very least. One final note: the style in which the illustrations are drawn is not really my taste.
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BIG UPDATE 2012-01-02:
By now, I've read the first 5 books of the series, and I really enjoyed the first two.
In the following three books (#3, 4 and 5) it went downhill (although the first half of #4 is pretty good): they felt very similar to each other, nothing really happened (again, except for the first half of #4) and it became less and less interesting to read.
From the sixth and last book, I skipped through the pages and read some random fragments, but I didn't find anything interesting enough for me to read the entire book.
Conclusion: the first two books are the ones I liked, the rest wasn't really worth it.