In the Study with the Wrench — Diana Peterfreund

The thrilling sequel to the book that Kirkus Reviews called “ingeniously plotted and vastly entertaining,” inspired by the classic board game CLUE -- now in paperback!
 
New semester. New secrets. New murder.
 
In the aftermath of their headmaster's brutal murder, Blackbrook Academy has been thrown into chaos. Half the student body hasn't bothered to return to campus -- but those who have include Orchid McKee, Vaughn Green, Scarlett Mistry, Beth “Peacock” Picach, Phineas Plum, and Sam “Mustard” Maestor, now warily referred to by the other students as the Murder Crew.
 
When another staff member is found dead, each teen's reasons for sticking around come to light. Orchid and Vaughn grow ever closer to having their secrets exposed, Peacock and Scarlett struggle to change their stripes, and Plum and Mustard question everything. As everything comes to a boiling point at Tudor House, nobody's life will ever be the same.