In-ká-hai: How Sweet It Is!

In-ká-hai: How Sweet  It Is! is the true-life story of Pete and Leah Humphreys, who spent 17 years working in the arid Chaco region of Paraguay. They were Bible teachers to the Manjúi. These tribal people had no knowledge of the Bible and were steeped in their traditional beliefs.


Despite being very careful to teach the Bible clearly, the Humphreys encountered problems. The Manjúi put on a veneer of Christianity, but underneath they clung to their animistic beliefs. They were mixing two belief systems together. What could Pete and Leah do? The Manjúis’ eventual trust in Jesus is an exciting story of front line ministry in action.


Learn what the Humphreys did to overcome the challenges, and more importantly, see how it is applicable to ordinary believers anywhere in the world today.


Includes a six-session study guide based on lessons drawn from the story:

  • The importance of credibility in sharing the gospel
  • What needs to be considered when sharing the gospel with the biblically illiterate
  • How a person who is not a gifted communicator can share the gospel
  • The question of those who say they are saved but don’t act like it
  • The problem of syncretism and how to address it

Appropriate for these audiences:

  • Personal reading and reflection
  • Small groups
  • Christian schools
  • Bible colleges and seminaries (pastoral, missions, evangelism)
  • Sunday school

Part of the Ambassador Series:

In-ká-hai is part of the Ambassador Series, which is a curriculum that equips believers with the mandate, message and method of sharing the good news of Jesus Christ.

Narrative: The first part of the book is the true story of the Humphreys and their team taking the gospel to the Mánjui people of Paraguay.

Photos: The book has numerous photos of the missionaries and the Mánjui people.

Study guide: The six sessions in the study guide draw on the Humphreys' experience with the Mánjui to guide believers on how to be more effective ambassadors for Christ in their everyday lives.

Appendices: Additional material to help believers be more effective in sharing the gospel message.


In-ká-hai: How Sweet It Is!

160 pages.

Download the fact sheet

Read a preview of the book













I see the problem of syncretism!

Michael said, "I read the book! And I now see the problem of syncretism. It's a problem we have all around us!" He had come to understand, after reading In-ká-hai, that in today's world, many people have never cracked open a Bible. Consequently, when they hear about Jesus, they don't know who he is and what he accomplished on the cross.


Read on to find out how Michael's view of evangelism changed after reading the book. >>


In-ká-hai captured the minds of my children

Our family has really enjoyed reading In-ká-hai! I have read it to the family, one chapter at each sitting. We finished the epilogue tonight and we will go through the study questions the remainder of this week.


It is a wonderful book that has captured the minds of my children. You can ask them a Manjúi word like “noki-wota” and they will tell you that the word means “honey.” Or “in-ka-hai” means “how sweet it is.” Pretty cool, eh?


Read Howard's story >>


More about In-ká-hai

Get a glimpse of the history of In-ká-hai and how it was written.








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