Danny and Ron Orlis and the Mexican Jungle Mystery — Bernard Palmer

Ron Orlis planned to spend his summer break giving out Bibles and literature with friends in Mexico. But he soon meets Pedro, a 14-year-old Indian boy, who recently became a Christian and is desperate to return to his village to tell his family about Jesus Christ. Ron and Pedro go together to the boy's home but meet with danger and opposition from the police, a witch doctor, and hostile villagers. Ron and his friends learn to wait on God and trust Him to do what He's promised, in spite of threats and even imprisonment.