I received a free copy of 31 Days of Power by Ruth Myers from Waterbrook Multnomah Publishing Group for the purpose of review. This is the 2nd "31 Days" devotional book I have read, and I have enjoyed both of them. The focus of 31 Days of power is spiritual warfare. Every devotional reading is a scripture based prayer that focuses on a different spiritual warfare theme such as the power of God's goodness, victory, overcoming the world, etc. Ms. Myers has provided the scripture she used when writing each prayer for easy reference. At the end of the devotional is a short Bible study on the dynamics of spiritual warfare.
I think any Christian would benefit from reading this book. It is very practical, and easy to apply in daily life.