Law's complexities

For an intriguing and inspiring comprehension of Western Legal Thought, E. Engle, Ontology, Epistemology, Axiology: a Basis for a Comprehensive Theory of Law , available at SSRN

Law's Ontology

A deep inquiry on Law's Ontology
P. Amselek and N. MacCormick (ed.), Controversies about Law's Ontology , Edinburgh University Press, 1991.
For an overview of the contents click here

Reformulating Legal Ontologies

A very brilliant assessment on this topic: G. Wilson, Refactoring the Law: Reformulating Legal Ontologies