Looking at that book I had a very vivid sense of déjà-vu and then looking at the author I realize that i read a precedent encyclopedia about dinosaur and prehistoric animals by that author. Very well done, beautiful and fun to have on a coffee table and just goes into it from time to time. But not sure I've seen major difference with the previous one, so if you already had a previous Barry Cox encyclopedia of dinosaur not sure buying the new one is worth it, but if you don't this is one worth looking for!