This is great to help intermediate folders (like moi) move to more advanced models. Robert Lang is just the best; I'm a huge fan and will one day buy all of his books. Lang tries to make realistic looking animals with the correct number of legs/fins/appendages. Lots of origami artists can make an approximate shape and the viewer gets the idea of the animal, but they are generally less anatomically correct. The other cool thing about this collection is that each animal has some real-life fact that goes with it. It's a nice touch.