Unity Shaders and Effects cookbook. I'm linking you to the 5th edition because it's probably more relevant. I bought the 4th one for cheap on kindle and it was super helpful until I got to the 4th chapter which used cubemaps which have obviously changed between unity 4 and 5 probably 2017 as well lol. But I just bought a used physical copy of the newer one which I hope gets here soon.
Either one you go with will get you writing good shaders quickly as long as you can use your imagination. After the first chapter I got a lightsabre shader up and running easily. It also covers post processing effects later in the book and supposedly goes into making your own cinematic filter.
There is an Updated Unity Shader Cookbook for Unity 5 and standard shaders by Alan Zuconni.
Nice write up. Look forward to the next one.
Just got Alan's book on shaders. It's a great resource! He even talks about fur shaders.