The official e-book explaining URP shaders and VFX in Unity 6, Japanese version is released for free. Three official tutorial videos are also available.

The official e-book explaining URP shaders and VFX in Unity 6, Japanese version is released for free. Three official tutorial videos are also available.
Unity Technologies Japan Releases Free E-Book "Cookbook: Shader and Visual Effects (VFX) Recipes" A book that explains techniques for creating URP shaders and VFX, and sample projects and tutorial videos related to the book are also available...

The linked article is in Japanese.