Harvard grad student Dulcie Schwartz sets out to prove a troubled academic innocent in this "unusual and intelligent" paranormal feline mystery series (Booklist). It's spring break, and Harvard doctoral candidate Dulcie Schwartz has stayed behind in almost-deserted Cambridge, Massachusetts, to concentrate on her thesis. But when Jeremy "Mumbles" Mumbleigh, a once-promising student turned harmless vagrant, is found injured—with a valuable missing book clutched in his arms—Dulcie puts her thesis on hold. What was he doing with the book? And why has it turned up after all these years? With Jeremy now the prime suspect for a series of break-ins in the area, Dulcie is determined to clear the unfortunate former scholar's name. But when she finds a connection between the book he was carrying and her own research into an anonymous Gothic author, the search for clues takes on a new intensity—and a new menace. Code Grey is the ninth book in the Dulcie Schwartz Feline Mysteries, but you may enjoy reading the series in any order. "[This] series continues to surprise, with additional backstory on some of the characters adding layers of interest. Readers will not want Dulcie to finish her dissertation anytime soon." —Booklist