Here is the Dewey Dilemma I encountered a week or so ago. I had to make a distinction between 914-919 (Geography & Travel) and 940-990 (History). Simple, right? Well, what about when a book about a country contains what appears to be equal measure of descriptive travel/geography information and historical information? Instinct tells me to go to our existing collection and find similar materials and see where they’ve been classified in the past. So I did that, and of course, there are books classed in both areas. Eventually I put the book in hand in 940-990, because those numbers are more commonly used, and in our collection the rule has generally been that we put things there unless they are pure geography, or “Canada in Pictures” -type works. So that’s how I figured out that one.