Andrew Root has been the most influential writer in my life. His books on relational/incarnational ministry and The Promise of Despair have greatly shaped how I understand the gospel and how we join God's work in the world.
Jake Bouma is a youth pastor that I have connected with online who has been diagnosed with Hodgkin lymphoma. He has been hosting a "Cancer & Theology" series on his blog, inviting various theologians and pastors to offer some reflections on this horrible demon.
Andrew Root's post came today and is powerful. He gives a warning of "bad" language, so if you can't put up with that, find something else to read. But for those of you interested... Andy Root on Cancer & Theology.