"a ninja rolls into the forum..."
-Chris Kavanaugh
As far as online resources go, there's an awful lot out there with respect to DoD, corporate security, etc...you can cull some good information, but you're going to have to wade through a lot that's at best tangentially related to residential security. With that in mind:
Start with Anderson's "Security Engineering" Chapter 11 - Physical Protection
http://www.cl.cam.ac.uk/~rja14/book.html
While not necessarily geared toward the setup and installation of a security system, it does give an excellent discussion of the trade-offs of physical security (e.g., missed alarm rate vs. false alarm rate, etc.). This is the backbone of security design 'cause if your world view is flawed, your implementation is going to suffer.
Also check out "NFPA 730: Guide for Premises Security"
"Document Scope: 1.1 Scope. 1.1.1 This guide describes construction, protection, occupancy features, and practices intended to reduce security vulnerabilities to life and property."
NFPA 730 isn't a how-to on security design / setup, but it is a very accessible overview / discussion of what's available to and recommended for a homeowner rather than, say, an Air Force base. A bit of google-fu should turn up a copy.
The article "Alarm design reads true" is decent.
Zwirn, 2003, Alarm design reads true: Security Management, v. 47, no. 4
"Jim Grover's" "Street Smarts, Firearms,and Personal Security" is excellent on many levels. There's only a few chapters that discuss residential security, but I recommend the entire volume even if you never plan to handle a firearm in your lifetime....now if I could only get my girlfriend to read it.
http://www.amazon.com/Street-Smarts-Firearms-Personal-Security/dp/1581600674Hope this helps.