At the moment Stéphane's graphics driver book is 69 pages long. Current sections include the introduction, a look at the hardware, the picture, frame-buffer drivers, the Direct Rendering Manager, X.Org drivers, video decoding, OpenGL, Mesa, Gallium3D, GPU Computing, suspend and resume, technical specifications, beyond development, and conclusions. "The book will be targeted towards new contributors but will have enough details to be useful to all levels of graphics driver development."
http://people.freedesktop.org/~marcheu/ ... rivers.pdf