
"The revised and updated 7th edition of this highly regarded book brings the reader right up to speed with the latest financial market developments, and provides a clear and incisive guide to a complex world that even those who work in it often find hard to understand"
Something like The Economist's Guide to Financial Markets will give you a good general overview.
Some of the recommendations on here are truly awful.
(https://www.amazon.co.uk/Economist-Guide-Financial-Markets-6...)