2.5 stars.
I only listened to books 1-3, and that was enough.
While the idea of fighting, tribal owls is incredibly interesting, it is not on par with other similar series, such as The Warrior Cats, Podkin One-Ear, or The Green Ember. Why?
Kathryn Lasky and her owls... absolutely loved the idea. I now love owls, and I really want to get my hands on some wet poop jokes. Unfortunately, Lasky writes in a way that leaves gaping gultches and plot holes in her story.
I can't give any specific examples at the moment, but the passage of time is absurd. There is no indication that, say, a whole year has passed in the Ga'hoole tree, leaving the reader confused and flipping back a couple of pages to see what they missed.
Additionally, characters seem to come to realizations that the author didn't explain to the reader, and the author didn't even explain to the characters themselves. E.g., the commet. It just 'appears' with no explanation, and it seems to 'appear' several different times. It's weird. I apologize for my inability to explain, but if you read it for yourself, you'll understand.
So, eh, this series was interesting, but I wouldn't go out of my way to recommend it.
#TwilightIsTheBest