Sixty-five million years ago, the dinosaurs suddenly vanished for reasons we do not know and, of course, will never know for sure. This book takes us to the end of the Mesozoic era, just before the extinction of the dinosaurs. The hero of the book is not a human - since humans did not exist then - but a prehistoric insectivore, the deltatherid. Along with him, we experience his adventures and struggle for survival, and we learn about the animals and plants, the various dinosaurs, and the primitive mammals of that time. [Excerpt from the text on the back cover of the edition]