I started reading xUnit Test Patterns
by Gerard Meszaros over the weekend, and I've been really impressed with it so far. I'm having a very similar experience to when I first read Patterns of Enterprise Application Architecture 
by Martin Fowler. It's the sudden realization that other people have had to face your exact same problems, and they've come up some pretty elegant solutions.
Also similar to PEA, xUnit Test Patterns is valuable for experienced development teams in that it names patterns you've been using for a while. Instead of saying, "Remember how we had that setup SQL script for that big search test on that one project," you can say, "Let's use the Back Door Manipulation pattern to setup our data."
I'm only about 100 pages in; I'll try to provide a full review when I finish/decide I've read enough.