I don't have it with me, but I love the recipe in How to Bake by Nick Malgieri. This is the recipe I'll use to make soda bread on March 17.
Also, I recommend Bernard Clayton's Complete Book of Breads. He has a richer soda bread recipe that I've never tried, but it looks awesome, and I've loved all the other bread recipes I've made from his book. (I made the Cuban Bread just this weekend - Yum!)