Going back to the sources of what is known about scepticism is the focus of this book, examining the theory of knowledge and just how proofs and justifications have been developed by a number of thinkers. Scepticism and the Possibility of Knowledge by A.C Grayling is a detailed text, and it’s useful to take this one at a measured pace, in comparison to some of his other works like The Meaning of Things or What is Good, which are comprised of slightly more general discursive essays.

This work aims to investigate whether there is such a thing as absolute knowledge, using Berkeley and Russell, Quinne and Wittgenstein. It seems to follow on from an earlier work, The Refutation of Scepticism, such as investigating evidence for an external world and what weight we should give to such arguments. Overall, it’s a useful reference book, one that I probably wouldn’t suggest as an introduction to the fantastic range of topics A.C Grayling has written on more recently, but as a historical reference and grounding in philosophical scepticism, it’s worth taking a look at.