The new Ray Tracing Gems book is available as a free and legal PDF download : r/GraphicsProgramming
GPU Gems: Programming Techniques, Tips, and Tricks for Real-Time Graphics
Ray Tracing Gems: High-Quality and Real-Time Rendering with DXR and Other APIs by Eric Haines
Gpu Gems 2: Programming Techniques for High - Performance Graphics and General - Purpose Computation : Pharr, Matt, Fernando (Series Editor), Randima: Amazon.in: Books
MyData/GPU Gems 3.pdf at master · yyc-git/MyData · GitHub
BookContainer/GPU Gems 3.pdf at master · Calence/BookContainer · GitHub