Question about the book "Secure architecture with OpenBSD"

[Jean-Daniel Beaubien]

Hi everyone,

I was just about to order the 4.0 CDs and I figured I'd get a book along 
with it.  I was thinking on getting 'Secure architecture with OpenBSD'. 

My question is since it was written in 2004 is it still up-to-date? Also 
is there a 2nd edition in the works?

Thank you for your time,

Jd