How to find 'good' literature on a phenomenon? With this being a potentially subjective question I know I'm threading on thin ice, but this is an actual "physics" problem I face from time to time:
The situation is this: I hear about some phenomenon. For the sake of definiteness, let's say it is the Jahn-Teller-Theorem. I'd then like to find a good source that has a graduate level introduction to this phenomenon. The problem is that all Google turns up is either a very simplified explanation of the thing at hand (think Wikipedia), or a research level text that assumes its readers already have a perfect understanding of what the thing is. And original papers often do not provide such a clear answer (Legend has it that Born and Oppenheimer's paper on the adiabatic approximation is quite inaccessible and the relevant thing, the BO-Expansion, appears hidden somewhere in the appendix...).
I believe that I am not alone with this problem and I wonder if there is a straightforward approach to finding good introductory (but NOT superficial) texts on a given phenomenon. 
 A: As already said, there is probably no universal answer. Probably best and most obvious options are:
-asking here :)
-searching directly in Google Books. You will probably find both introductory, but still advanced texts, and very technical ones. 
-checking references. This is obvious, but it is usually worthy to a) find any advanced paper on the subject b) look up all the papers mentioned in the introduction.
By the way: google has lauched beta of 'Google scholar', which allows to search papers by key-words, citations etc
A: If I'm trying to learn about, say, geometric phases, what I tend to do is fire up scholar.google.com and search for

"geometric phases" review

and 

"geometric phases" resource letter

That usually does the trick. And I tried this for { "jahn-teller" review } and I found an AJP article titled "The Jahn–Teller effect: An introduction and current review". I presume that's the kind of thing you're looking for?
Of course, the broader your search topic, the more likely you are to find a good review or resource letter.
