It's thorough -- full of practical no nonsense information and just enough humor to make it a fun read.
Absolute OpenBSD takes you through a logical progression of stages -- such as installation, configuration and implementation of various features -- and then covers the more advanced topics in sufficient detail that you can tackle them and make them work for you.
Topics include installing OpenBSD -- with excellent guidance on partitioning, the boot process, managing users, disks and file systems, a great overview of TCP/IP and networking, software management. network servers, desktops, configuring kernels, upgrading, packet filtering, and customization. There are also chapters on security, and avoiding root. Just look at this list of chapters:
Chapter 1: Getting Additional Help Chapter 2: Installation Preparations Chapter 3: Installation Walk-Through Chapter 4: Post-Install Setup Chapter 5: The Boot Process Chapter 6: User Management Chapter 7: Root, and How to Avoid It Chapter 8: Disks and Filesystems Chapter 9: More Filesystems Chapter 10: Securing Your System Chapter 11: Overview of TCP/IP Chapter 12: Connecting to the Network Chapter 13: Software Management Chapter 14: Everything /etc Chapter 15: System Maintenance Chapter 16: Network Servers Chapter 17: Desktop OpenBSD Chapter 18: Kernel Configuration Chapter 19: Building Custom Kernels Chapter 20: Upgrading Chapter 21: Packet Filtering Chapter 22: Advanced PF Chapter 23: Customizing OpenBSD
This is truly an excellent book. It's full of essential material on OpenBSD presented with a sense of humor and an obvious deep knowledge of how this OS works. If you're coming to this book from a Unix background of any kind, you're going to find what you need to quickly become fluent in OpenBSD -- both how it works and how to manage it with expertise. I doubt that a better book on OpenBSD could be written.
Read more of Sandra Henry-Stocker's Unix as a Second Language blog and follow the latest IT news at ITworld, Twitter and Facebook.