In the Study with the Wrench is the second YA Clue mystery by Diana Peterfreund. I got my copy via interlibrary loan.
Review:
In the previous book, snow and flooding trapped several Blackbrook Academy students in Tudor House, a lovely old building with several secret passageways. The headmaster was murdered, and the murderer was eventually caught and arrested.
Blackbrook Academy has somehow miraculously managed to remain open, despite massive flood damage and a bunch of students transferring out because their parents are understandably concerned about the recent murder. The school and its new headmaster are now entirely focused on moving past all of this. That means no trouble, no bad press, and no more students leaving.
Unfortunately, Blackbrook happens to have a lot of people with dark secrets, and Rusty Naylor, the head janitor, is one of them. His latest scheme gets him killed, and when his body is finally discovered the big questions are 1) Who killed him? and 2) Can Blackbrook's students convince administration that their standardized tests should at least be untimed?

