The Wonderful Man by Edward Monkton
This book is radically different to the majority of recommendations usually given here. It takes about a minute to read but I just fell in love with it's lovely, simple approach.
It presents a key point that is so important for people to understand.
I have read it over and over again and it is more of something that everyone has time to read.
Buy it. Read it yourself and share it with as many people as possible.