The creator of Dilbert, Scott Adams, isn't just a funny man. He has written a serious book called God's Debris which discusses several life altering questions in a teeny tiny tome. In the introduction of this book, Adams suggests that the book will be best enjoyed if discussed after reading. My husband and I both read the book and then had a discussion about it. Some of the topics covered: probability, the nature and purposes of God, relationships, and free will. This book is set up for creating discussions. You will like this book if you like to discuss what you read. You will NOT agree with everything that the main viewpoint of this book proposes as truth.
If you like books that stretch your mind and give you food for thought, this book is for you. If you like to use ideas from books as a jumping-off point for discussion, encourage a friend or two to take up this thought experiment with you. It is a fast read, but it will stick with you for much longer than the time it takes to read. This book can be found for free online here.
It can also be found at amazon.com, if you want a print version.