Danny Orlis makes friends with a couple of new kids named Tip and Trixie Blanshard. As Danny leads them in exploring the islands, they come across a forest fire that is just starting. They are able to get it put out, but there doesn't seem to be a good explanation for why it started in the first place. A strange accident, being followed and another fire's starting add to the mystery.
Danny Orlis is off to Colorado to investigate a mystery for his father. It seems that a troublemaker from the past is interested in property belonging to Ron and Roxie, the twins adopted by the Orlis family. Previously, the area was reported to be a wasteland, but recently someone has been exploring it and trying to gain access.
Danny and his cousin Mike get caught up in a spy chase as they, the FBI, the RCMP, and Danny's father pursue an enemy agent from Minnesota to Point Barrow, Alaska. Will they be able to follow the trail through the lies, deceit and betrayal to expose the enemy agent?
Danny Orlis and his friends are helping Danny's dad with a hunting expedition. One of the hunters doesn't follow instructions and appears to be lost. While searching for him, they find themselves trapped by criminals. Trusting God and doing the Christ-like thing brings another opportunity for Danny to bear fruit for the Saviour.
Danny Orlis has finished the highest grade level at the Angle Inlet school, and now he will be going away to attend high school. He plans to live with his uncle in Colorado and go to school there, but just before leaving he learns that the relatives with whom he will be living are not Christians. Danny learns how quickly a compromising Christian loses influence and how important his testimony is.
In this Danny Orlis adventure, we find a reluctant Danny traveling to Mexico to assist his missionary aunt in what turns out to be a dangerous situation. The mission team has completed a translation of the New Testament for the native people, but before it can be printed, a mob sets out to steal the manuscript and keep the Gospel away from their people.
Danny Orlis's twin cousins are coming for the summer. While on the way to pick them up, he overhears a conversation that promises to give them a special adventure during their time together. Buried treasure, clues from an old Indian chief and a discovered map all add to the mystery. They soon discover they are not the only ones searching for the treasure.