Economics was described by the English economist Lionel Robbins in 1935 as 'the science of scarcity' but these days economics is everywhere, and it's never been more popular - as bestselling books such as Freakanomics attest.

But what is economics really all about? What do the great economists think, and what can economics do for us today? David Orrell, author of Economyths, explains all in Introducing's trademark intelligent but witty stle, accompanied by brilliant illustrations from the legendary Borin van Loon.