Are you looking for some good Christian biography that will encourage the soul and bolster faithful living?  If so, see the post linked here on the life of JI Packer. He is one of the most influential Christian theologians of the past hundred years, who recently celebrated his 90 birthday. Below are also a couple of fuller treatments of his life, ministry, and impact.  

JI Packer: An Evangelical Life, Leland Ryken

Packer on the Christian Life: Knowing God in Christ, Walking By the Spirit, Sam Storms