Ted Dekker has been kind enough to offer "Black" to be read for free, online. "Black" is part of the "The Circle" trilogy. The free ebook requires Macromedia Shockwave Player.
Caveate Lector: you'll want to read the other two books when you finish "Black".
I won't ruin it for you... We own all three, and Cathy has not finished yet, so all I can say is that I was stirred to consider how I am living my life as a Christian by the time I was partway through the third book.
And, I've really enjoyed the reading.
Oh, if you decide to purchase the books for yourself, there is a 50% coupon for "Black" on the web site (look under "special offers" when you click on "Black") and a $3 coupon for any book in the trilogoy.