In the hitherto missing Sixth Mystery, Humboldt Prior, now well-established as a third-career university lecturer at the College of Information Technology, finds himself "on loan" to the prestigious Harger Business School, serving on a task force to track down $1,000,000 of lost endowment funds. As the mystery unfolds, present day murders and other crimes are compounded by those more ancient, along with the usual academic infighting and graduate student...