This textbook provides a non-technical introduction to the philosophy of science. Through asking whether science can provide us with objective knowledge of the world, the book provides a thorough and accessible guide to the key thinkers and debates that define the field. Couvalis surveys traditional themes around theory and observation, induction, probability falsification and rationality as well as more recent challenges to objectivity including relativistic, feminist and sociological readings. This provides a helpful framework in which to locate the key intellectual contributions to these debates, raning from those of Mill and Hume, through Popper and Kuhn through to Laudan, Bloor and Grafinkel.