One of the most influential books in my spiritual development was When I Don’t Desire God by John Piper. I recently re-read the book and was shaped by it again. To help you get more out of the book, I wrote an “unofficial” study guide.
The purpose of the book is to help Christians to fight for joy in God. In sum, it is a book about the theology which undergirds spiritual growth, and the different practices that a Christian can engage in so that they would grow in Christ.
There is a free PDF version of the book here.
And the study guide is here for download: When I Don’t Desire God- Study Guide.