This title provides an introduction to contemporary ontology. Effingham covers the key topics in the field, from the ontology of holes, numbers and possible worlds, to space, time and the ontology of material objects - for instance, whether there are composite objects such as tables, chairs or even you and me.

1. The basics -- 2. Methodology -- 3. Properties -- 4. Numbers -- 5. Possible worlds -- 6. Space -- 7. Time -- 8. Mereology -- 9. Material constitution -- 10. Works of music.