Yunus Ciptawilangga wholeheartedly choose to become a follower of Christ in 2000, after twenty years learned the five religions, namely Hinduism, Buddhism, Islam, Catholicism and Christianity.

In 2006 he began to explore the material of the end times. With two other writers, namely Rev. Jopie Rattu, Ph.D., and Mr. Sridadi Atiyanto, Ph.D. managed to write two books of the end times with the title "The Rapture, the Fulfillment of: the Signs in the Sky, the Festivals in Summer, and the Parable of the End Times" part 1 and part 2 and published by Elm Hill HarperCollins.

He also wrote thirty thin books derived from the material of his sermon which was then made into four books consisting of a combination of seven to eight thin books. The four books each take one of the book titles as the combined title of the book. The first book is entitled Human Life Priority, the second book The Blessed Christian Family, the fourth book Faith and Deeds which were also published by Elm Hill HarperCollins. Becoming a Fruitful People of God is his third book which consists of seven books, where other books are: The Fruit of the Spirit, Victorious People, Be Converted and Become as Little Children, Our Speech, Joy and Main Duties of a Servant of God.

Some of the topics may be complex, but the author uses simple language and examples to promote learning and understanding.