In order for this recipe to work, you will need a texture that shows how you wish to have your fur displayed:
I have provided two examples in Chapter 11 | Textures folder with the book's example code (Faux Fur and panda).
Like all the other shaders before, you will need to create a new Standard Surface Shader (Fur) and a material (FurMat) to host it, and attach it to a sphere for demonstration purposes: