My example-driven account of natural kinds.
Some scientific categories seem to correspond to genuine features of the world and are indispensable for successful science in some domain; in short, they are natural kinds. This book gives a general account of what it is to be a natural kind and puts the account to work illuminating numerous specific examples.
@BOOK(Magnus2012, AUTHOR = {P.D. Magnus}, TITLE = {Scientific Enquiry and Natural Kinds: From Planets to Mallards}, YEAR = {2012}, PUBLISHER = {Palgrave MacMillan}, ADDRESS = {Basingstoke, Hampshire} )