Richard Haines has released the 2nd edition of The SELinux Notebook, an extensive work of documentation aimed at explaining SELinux to newcomers. It is also intended to be a reference document for the policy language and configuration. The Notebook has now been split into two volumes: The Foundations and Sample Policy Source, and updated to the latest implementation of SELinux in the Fedora 12 distribution. New topics in this edition include virtualization (sVirt), SE-PostgreSQL, XSELinux and Apache/SELinux Plus. The notebook may be downloaded here.