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.
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.
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.
