As well as the (currently) free Instant Family Devotions by Mike Nappa, Mike and Jill Wuellner, consider:
The God of all Comfort: Finding Your Way into His Arms by Dee Brestin @ $0.99.
I’ve only just started it, but I like the way Dee turns to the Psalms as a way to deal with reality, e.g.:
God wants honesty from us because He wants intimacy with us.
She quotes Bonhoeffer (Psalms, 1970, 9):
Prayer does not mean simply to pour out one’s heart. It means rather to find the way to God and to speak with him, whether the heart is full or empty...
