50 philosophy ideas you really need to know. Ben Dupre. 2007.

Have you ever lain awake at night fretting over how we can be sure of the reality of the external world? Perhaps we are in fact disembodied brains, floating in vats at the whim of some deranged master-scientist? If so, you are not alone - and what’s more, you are in exalted company. For this troubling question and other ones like it - from Occom’s razor to the barber paradox - have been the stuff of philosophical rumination from Plato to Putnam.

In a series of 50 accessible and lucidly written essays, Ben Dupre introduces and explains the problems of knowledge, consciousness, identity, ethics, belief, justice, language, meaning and aesthetics that have engaged the attention of thinkers from the era of the ancient Greeks to the present day.