Think, A Compelling Introduction To Philosophy
This book is for people who want to think about the big themes: knowledge, reason, truth, mind, freedom, destiny, identity, God, goodness, justice. These are not the hidden preserve of specialists. They are things that men and women wonder about naturally, for they structure the ways we think about the world and our place in it. They are also themes about which thinkers have had things to say.

If readers have absorbed this book, then they should be on better terms with the big themes. And they should be able to read many otherwise baffling major thinkers with pleasure and reasonable understanding.