If you're reading this book and you're not a Christian, first of all, thank you for choosing it and reading this far. At the very least, I hope you find something here that challenges you to think about Christians, Christianity, the Bible, and ultimately, Jesus, in ways that may be different from how you've reasoned until now. I hope you come to realize that we Christians don't believe what we believe without reason.
If you're already a Christian, I hope it helps you better understand why you trust the Bible, and then helps you become equipped to talk about that trust and defend it from the objections of people who don't trust it. The truth is, in the end, even though the world often accuses us, Christianity doesn't require people to make an irrational "leap of faith" that leads us to believe ridiculous things without evidence. On the contrary, our real "leap of faith" consists of depending on Jesus to save us from our sins, precisely because He is eminently and completely trustworthy.