There is little doubt that many aspects of the wildlife of the UK are under threat, and a book about trying to find the 40 rarest breeding birds in the country has the potential to be a depressing read - a kind of quest for the dying. However, this book manages to be both serious in its intent and entertaining at the same time. Rare birds are found in car parks after long days in prime habitat, a species eludes the author on regular occasions and he is eaten alive by midges - all of which ring true as birding experiences. If each bird represents a "verse" of this book, then the causes of their decline becomes the "chorus" - with aspects such as habitat loss, changes in agricultural practice and climate change being repeated throughout.
Although each chapter is largely self contained I did find some of the changes from species to species a little abrupt, some occurring in the middle of a chapter. While I know a book on 40 species does not need 40 chapters some of the transitions from bird to bird were not smooth.
This is really my only criticism of an entertaining and informative book.