When Moonridge College's beloved evening librarian is found dead in the history stacks, Diana discovers that some moral dilemmas can turn deadly.

November brings cozy pre-Thanksgiving energy to Moonridge College, but the peaceful evening atmosphere turns deadly when librarian Diana Foster discovers part-time evening librarian Kate Williams dead in the American History section. What appears to be a heart attack during a quiet evening shift reveals itself as murder when coroner Helen Roberts discovers evidence of strangulation.

Kate had recently uncovered an inappropriate affair between a respected married professor and his graduate student, creating a moral dilemma about whether to report the relationship or give the people involved a chance to end it voluntarily. Her compassionate decision to confront them privately rather than immediately involving the administration ultimately cost her life.

Working with Detective Scott Erickson and research assistant Emma Fielding, Diana must navigate campus gossip networks and personal relationships to uncover the desperate circumstances that drove someone to murder. When the investigation reveals that Kate returned to the library after hours for what she thought would be a confidential conversation, Diana realizes the killer exploited Kate's kindness and ethical nature to lure her to her death.

As suspects emerge from the college community?including the professor whose family and career hung in the balance, the graduate student facing academic and financial ruin, and Kate's own sister struggling with gambling addiction?Diana discovers that Kate's murder was the desperate act of someone who chose violence over accountability.

The sixth installment in the beloved Moonridge Library Mysteries proves that even in places dedicated to learning and knowledge, the most dangerous secrets are often hidden in plain sight, and that doing the right thing can sometimes exact the ultimate price.