I really, truly wish this third book was not the final one in the series. The substance, storylines, tension, and conflict make Mercy Triumphs a book you will want to finish in one day; I know, because that is exactly what I did.
While this book can be read as a stand-alone work, I highly recommend reading the first two books before reading Mercy Triumphs. The power of witnessing an American family living in Sudan, sharing about Christ, seeing the persecution taking place in Africa, and watching various characters within the book seeking out God's plan for their lives is quite incredible. What we believe God has planned for our lives is often not what He has planned for us... but when we trust Him and look beyond ourselves, we get to see that 'God causes all things to work together for good to those who love God, to those who are called according to His purpose' (Romans 8:28). Mercy Triumphs displays this beautifully, and for that reason I cannot recommend it enough.
*I received a copy of this book from the publisher, but was under no obligation to write a review. My honest opinion has been provided without any requirement to write a positive review.*