Spending time with Charlie and Diesel is always a pleasure and the 11 edition of the Cat in the Stacks mysteries is another entertaining read. Charlie is auditing a class of medieval history. The first class is pleasing and overhears and an angry comment from the professor, Carey Warriner, to a mature student, Dixie Bell Compton. The student is found murdered. Before too long, the professor is murdered. Kanesha asked Charlie to report to her all the comments the faculty makes on this teacher and student affair. We catch up on all the supporting characters, Ramos, is up to mischief of five months old, kitten. Charlie affair with Helen continues slowly. He babysits his grandchildren. Charlie needs the answer to the love triangle of the vice before he loses his life. I HIGHLY RECOMMEND THIS BOOK AND SERIES. Disclosure: Thanks to Berkley for a copy through NetGalley. The opinions expressed my own.