In the two previous ray tracing mini-books, the reader was led through making a basic ray tracer, and no graphics background was assumed. This volume extends from the first two but uses terminology and math that will help entry into the professional world of realistic rendering.
Librarian Note: There is more than one author in the Goodreads database with this name.
This Peter Shirley is an American computer scientist and computer graphics researcher, Distinguished Scientist at NVIDIA.
He earned his PhD in computer science from the University of Illinois, Urbana-Champaign in 1991. He then joined the faculty at Indiana University as an assistant professor. From 1994 to 1996 he was a visiting professor at Cornell University. He then joined the faculty at the University of Utah, where he taught until 2008 when he joined NVIDIA as a research scientist. (source: Wikipedia)
Not as exciting as In One Weekend, but satisfying to walk through the small changes and watch the noise performance of the ray tracing engine improve. I think this volume is still under heavy revision, so I'll probably revisit it in a few months.