The first 400 pages reproduce a selected subset of the Linux kernel source code. Maxwell, who writes software at the Jet Propulsion Laboratory, then comments on the code, discussing in each chapter a different kernel subsystem or other logical group of functionality, such as system calls or memory management. The CD-ROM contains the source code plus linux 2.2.5, linux 2.2.10 and linux 2.3.12. Annotation c. Book News, Inc., Portland, OR (booknews.com)