A phenomenal study, where it is very obvious the creator understands the ins and outs of not only human biology, but of avian, and beyond that as well. The angels feel as if they can comfortably exist in the real world. The colors are printed beautifully, and the glossy cover feels right. The book is a mix of sketches, more refined work, and anatomy charts that could have been pulled out of a medical textbook. This would be an excellent book for any fans of speculative biology (and birds).