By Antoine de Saint-Exupery
If you will not take the time to read the whole book, just read chapter 21 on page 64.
It is about Friends and Relationships. You can get this book in the children's part of the library, and don't worry if you do not have a card- this chapter is not to long and could be read right there.
If you just want to read the study of grown-ups then read chapters 1 & 7-23..... =)
Click here to buy it.
"What I see here is nothing but a shell. What is most important is invisible..."