In response to a question in Yahoo!Answers that seems to be from a newcomer to philosophy, I suggested the following books.
"If you're looking to get your feet wet, I suggest a classic by Will Durant, THE STORY OF PHILOSOPHY (1924).
"When you're ready to go a little deeper, and incorporate in your thinking some philosophers whose work is more recent than Durant's survey, I suggest Roger Scruton, MODERN PHILOSOPHY (1994).
"Then leap right in! Some quite recent books of worth include: Jesse J. Prinz, GUT REACTIONS (2006) ; Robert Kane, A CONTEMPORARY INTRODUCTION TO FREE WILL (2005); Doug Erlandson, THE THEORY OF KNOWLEDGE (2013). Enjoy the struggle."
I ended it that way because philosophy when engaged properly is a struggle. If you don't feel yourself to be torn in multiple directions by good arguments all around -- you're doing it wrong.
Yet this struggle, like many struggles, contains its own variety of enjoyment.