What is the theme in Rees Howells: Intercessor by Norman Grubb?

The Theme of Salvation is strong in this book. The message is that being a Christian is not enough to guarantee eternity with the Lord. One must experience salvation. There are several testimonies shared with Rees on the topic of salvation. Then Rees himself experiences salvation. His experience is what brings him to become an Intercessor and then he makes it his mission to share the message of salvation, first in the village, then in the mission field, and then he wants to ensure everyone in the world hears the gospel and the message of salvation.