What to read for Lent?

One of the ways I observe Lent (which starts tomorrow) is to read.  I know, that’s like a fish saying that he is making plans to swim.  I read quite a bit anyway, but for my specifically Lenten reading I look for something that is challenging yet devotional.   What would you suggest?  (I’ll give you some suggestions after the break.  I have an idea for what I intend to take on, but I’d like to hear your recommendations, not just for me but for anyone else who would like some profitable Lenten reading.)

For devotional reading, you can hardly do better than The Treasury of Daily Prayer, which offers a Psalm, a passage from the Old Testament, a passage from the New Testament, a writing from a church father, a passage from a hymn, and a classic prayer for each day of the week.