I read this book over and over. It's the one I'd pick to have on a desert island. The way Tozer talks about faith and living the Christian life--he takes what religion has turned into complicated and noncommittal routines and returns to the blessed simplicity of what it means to pursue God, to fully engage your heart with His. I can't write a review that will do the book justice. It's a short one and can be read in one day, so see for yourself.