There are many reasons why the Tyrannosaurus Rex is the world's most popular dinosaur: it was discovered in the United States on land where my grandfather McDonald lived during the golden age of paleontology. The T. rex found at the big monument in Montana was one of the most important dinosaurs in the world because it was the first one found in America which means the land is called the type site. It is also The type specimen which means it is the first skeleton of that type of dinosaur. So, the ranch has the distinction of being both the type site and being the first of that type skeleton ever found sometimes referred to as the "holotype" specimen of a new species, the first against which all others are compared. When the museum put the pieces together, they officially named the huge beast Tyrannosaurus rex, the Tyrant King. This book covers dinosaur history about the T. rex and its common predators, interesting facts about this dinosaur and about what caused the extinction of this, as well as the rest of the dinosaurs.