A MUST HAVE: Buy Real Time Rendering, 3rd edition! (if you haven't already) It's from 2008 but the content is still extremely useful and will teach you the "fundamentals" you're looking for .

You can also check out "Mathematics for 3D Game Programming and Computer Graphics, Third Edition" or "3D Math Premier for Graphics and Game Development".

Then you have the ShaderX/GPU Pro series that contain a wide range of techniques that might be useful to you (check the TOC before buying).

Here you can find a good list a graphics books

Also read papers/presentations from SIGGRAPH and GDC for free and useful techniques, like this ones

A MUST HAVE: Buy Real Time Rendering, 3rd edition! (if you haven't already) It's from 2008 but the content is still extremely useful and will teach you the "fundamentals" you're looking for .

You can also check out "Mathematics for 3D Game Programming and Computer Graphics, Third Edition" or "3D Math Premier for Graphics and Game Development" if want.

Then you have the ShaderX/GPU Pro series that contain a wide range of techniques that might be useful to you (check the TOC before buying).

Here you can find a good list a graphics books

Also read papers/presentations from SIGGRAPH and GDC for free and useful techniques, like this ones