This book recently released:

Wayne Grudem. “Free Grace” Theology: 5 Ways It Diminishes the Gospel. Wheaton, IL: Crossway, 2016. 159 pp.

This 42-page PDF excerpt includes the endorsements (by Darrell Bock, Ligon Duncan, Kent Hughes, John MacArthur, J. I. Packer, Tom Schreiner, Sam Storms, Dan Wallace, and Bruce Ware), a detailed outline of the book, the introduction, and chapter 1.

When I was in college, the church and school I was a part of embraced both Keswick theology and aspects of “free grace” theology. It led me to write a dissertation-turned-book on Keswick theology, which touches on the so-called “Lordship salvation” debate and its ramifications for false assurance. So I read Grudem’s latest book with great interest. His theology is sound, and his tone is just right.

Update on 8/23/2017: My latest book attempts to survey and analyze “let go and let God” theology: