There are a couple chapters in there on the subject, but it's probably not the best book specifically for that subject. I haven't read it yet, but "Working Minds: A Practitioner's Guide to Cognitive Task Analysis " looks pretty good. One of the people behind the method wrote several books for a general audience and one of them, "The Power of Intuition" (not what it sounds like) has a few tips on how to learn from experts:

*Probe for specific incidents and stories. This is not the same thing as listening to war stories. It means selecting incidents where intuition was needed, and expertise was challenged, and then digging into the details.

*Ask about cues and patterns. Try to find out what the expert was noticing while making sense of the situation. You want to uncover types of discriminations that the expert has learned to make, types of patterns the expert has learned to recognize. The decision-making critique can suggest lines of questioning.

There's more, but I don't want to quote too much... One of the other tips is to ask how a novice would approach things vs how they would. He also recommends avoiding asking for general theories, the experts may not really be able to describe how/what they do without having a story to guide them.