What is the theme in Shadow of the Almighty by Elisabeth Elliot?

The "God is in control" theme works hand in hand with the "trust God" theme. The author establishes a theme of God is in control within the first chapter where she lays out how God orchestrated the coming together of specific individuals from far away places at just the right times to meet, fall in love and marry and how these unions lead to the birth and Christian upbringing of Jim Elliot. God put these pieces in place generations before in order to pave the way for the missionary work to be done in the future.