[nomadlogic]

These books are pretty much a must read for anyone interested in the internals of Unix-type systems. I keep them right next to my TCP/IP Illustrated volumes, I reckon it's always good to have good reference material handy - especially when it is well written and researched.

[danso]

You sold me. I'm not particularly interested in knowing enough about FreeBSD to diagnose anything non-trivial, but I am interested in learning about design decisions behind operating systems.