As a cataloger, even I am sometimes surprised by the mysteries and quirks of the Dewey Decimal System.  For example, I recently discovered that the correct number for books about cheesemaking is 637.  While this makes sense in a way--the 630s are for agriculture & related technology, and cheese is an agricultural product--using this number ends up putting cheesemaking books on the shelf between animal husbandry (the books around 636.9 focus on keeping hamsters, ferrets, raccons, and foxes) and insect culture (see 638.1 for beekeeping).  While the relationship between making cheese and beekeeping is a little more obvious than that between making cheese and keeping pet ferrets, we nonetheless felt that people would be more likely to look for cheesemaking information in our cooking section, at 641.  In fact, we already had several books at 641.373, which is the interdisciplinary number for cheese (i.e. books that deal with some aspect of cheese other than its making or its use in recipes).  Another option would have been 641.673, but this really is more for cheese as an ingredient, rather than the making of cheese... never mind our cookbooks about grilled cheese sandwiches and mac and cheese!  (Though those end up classed with sandwiches and noodle & pasta dishes, respectively...)  You'll find all of them on the list below, though, or by visiting the library and browsing our collection.