In the role of one of the crew members sailing a yacht around the world, the reader will encounter dangers and must make decisions that will ensure the survival of the ship and her crew.
As a member of a young crew of astronauts on Mars, the reader is faced with real dangers and must make decisions that will determine the success of the mission.
As part of a group of young climbers trying to climb Mount Everest, the reader must make decisions that will ensure survival and success in reaching the summit.