You can use Oliver to find books in the library however sometimes it is helpful to know the Dewey numbers for a subject. In doing so you will be able to find books on that subject in most libraries. It will also be useful at those times when you know the topic but don't know where to start looking.
Note that resources about specific events will be located within the Dewey division for the country where the event took place.
200 | Religion |
220 | Bible |
230 | Christianity |
232 | Christology |
910 | Geography and Travel |
930 | Ancient World |