This is one of those rare books that breaks this narrow-minded stereotype that animal stories are for children. This book surprises with its adult content and violence with World War 2 themes ringing in the ears.
It's also a triumph of the author to evoke such a grand amount of emotion and I felt my heartstring weeping one moment and pounding with dread and excitement the next.
My only criticism is that the conflict with the Monster Owl was brief, but that plot is pretty much just the spring board for the main, and much more sinister, conflict.
Its a same that the rest of this trilogy is unavailable for UK audience, I think only the second book, The Lost Domain, has been translated into English.
More epic than the Owls of Ga'Hool and more emotive than One for Sorrow, a brilliant superior and should be a classic in animal literature.