I’ve been working to recreate all of The Book of Shaders exercises using Blender EEVEE instead of GLSL. This isn’t meant to be a replacement for the original site, just a companion so you can read the nerdy math stuff on the website and see how it can be applied in Blender.
If you aren’t familiar with The Book of Shaders, it’s an excellent resource created by Patricio Gonzalez Vivo and Jen Lowe that guides you through the theory and practice of creating GLSL shaders.
The Book of Shaders - Blender Edition
It’s still incomplete, but I plan on adding to it on a regular basis.