This is the second book in the series. Matt, Ben and Nicky have grown up together in the small town of Coolongawong in New South Wales. Last year, a new girl came to town. Her name was Kris and she quickly became the fourth member of the group. Now the four friends are about to start Year 6 with the school’s most popular teacher, and their teacher from last year, Mr Mac. They discovered in Year 5 that by tripping on a creaky floorboard and saying the magic words History’s a Mystery, they could be transported back in time and discover history as it is being made in exciting, and sometimes dangerous, adventures. They are now looking forward to another whole year of these adventures.

Mr Mac’s love of teaching history provides some of the destinations the four friends choose to visit. Others are the choice of the children. In this second book they continue to meet some of history’s most famous heroes, and are present at some of history’s most crucial times. Their adventures take them from a visit to the dinosaurs and the Ancient Olympics to man’s first trip to the moon, from a rainforest adventure to a meeting with Ned Kelly and to many more places in between.