If you're going to find a book for Lent, you have less than a week left to find it! Here are a few suggestions:
Through the Year with Pope Francis: Daily Reflections A collection of short excerpts from the talks and writings of Pope Francis, paired with questions and reflections that draw out an encouraging or challenging idea for the day. A good accompaniment for daily prayer -- or a "bathroom book" that anyone in the family can pick up and browse through.
The Screwtape Letters by C.S. Lewis What I'm currently reading aloud to my kids, ages 11 and up. It's a bit over the heads of some of them, but it's lively and entertaining and full of "Ouch, that's familiar" moments.