My two biggest shelf pulls are Real-Time Rendering [0] by Akeine-Moller, Haines and Hoffman. 3D Math Primer for Graphics and Games [1] by Dunn & Parberry

[0] https://www.amazon.com/Real-Time-Rendering-Third-Tomas-Akeni... [1] https://www.amazon.com/Math-Primer-Graphics-Game-Development...

I also read a ton of presentations and papers. Highly recommend the famous PBR SIGGRAPH course notes [0], especially the intro to light & physics by Naty Hoffman. GPU-Driven Rendering Pipelines [1] is another recent goodie.

[0] http://blog.selfshadow.com/publications/s2013-shading-course... [1] http://advances.realtimerendering.com/s2015/aaltonenhaar_sig...