The Design and Implementation of the FreeBSD Operating System
Marshall Kirk McKusick & George V. Neville-Neil & Robert N. M. Watson
Windows Internals: User Mode
Mark E. Russinovich & Alex Ionescu & Brian Catlin & Jamie Hanrahan & David A. Solomon
How Linux Works: What Every Superuser Should Know
Brian Ward
21st Century C: C Tips From the New School
Ben Klemens
Rake Task Management Essentials
Andrey Koleshko