I've got this book on Netgalley (like many...) it doesn't affect my opinion in anyway, but I say it for this book because part of it seem unfinished, so it probably won't be the case for the final published version but it was for mine so... What I notice is that some picture had not sentence on them but the «Add caption» notice and there is one who had a caption but in what look like Spanish or Portuguese maybe. That being said, that book is really good. It cover the entire world of the Owls, from basic anatomy, to their environment, the way they hunt, etc. etc. I though it would be a very basic children book about owl, but sincerely I learn stuff and I think most adult will, even if it's a book for children around 10 years old I would say. Lots of contents, but all is well explains, well organize, a lot of pictures. If you want to learn about owl this is a good book to do it!