You can never have enough economics, particularly at a time like this, and Ed Conway, economics editor of the Telegraph, has written a commendably comprehensive and concise book setting out 50 of the most important ideas in economics.

Each of the ideas is set out over just two pages, proving that you do not need to swamp the reader to get the point across. It is one of a series covering everything from management to mathematics, physics to philosophy. The book is available here.