In this book, 3 students had hacked every calculator to have the exact same answer, the detectives have to find who did It, but little do they know, it was exactly who they suspected...

In this book, A student sabotages the monthly mixer, causing everything to be destroyed and the mixer postponed. The main 5 have to figure out who did the crime... but as the story goes... you get a look at the past...

In this book, Someone kidnapped Mr Robinson and as the story goes you meet the main 4, solve mysteries, find clues, interrogate people. But what if the culprit... is amongst the staff