"The misfortunes of prosperity"- Daniel Cohen
"The undercover economist"- Tim Harford
"the wealth of poverty and nations"- D Landes
"The truth about markets"- John Kay
"The elusive quest for growth: Economist's adventures and misadventures in the tropics"- William Easterly
"The bottom Billion: why the poorest countries are failing and what can be done about it"- Paul Collier.
There are more but that should be enough to get started on
NB these are all books aimed at beginners in economics.
You will get an edge not by citing the name of something you have read, but rather by having a proper argument about the thing in your ps - its understanding that matters. To that extent most stuff on first year reading lists is fine, although I would advise you to steer clear of popular choices.
i'm going to try and read some more stimulating texts like books by keynes, just so i can really understand what macroeconomics really entails, this would also give me a discussion point on my personal statement if i find something quite interesting to comment on