The Quotient of Murder
by Ada Madison

Dr. Sophie Knowles loves using puzzles to make math fun for students. But when winter seizes Henley College, she must thaw out a cold case to track down a killer—her most difficult puzzle yet . . .

Winter Intersession is in full swing, and campus is buzzing over the concert celebrating the bell tower’s reopening. The building has been shuttered for twenty-five years, and Sophie’s shocked to learn why—a student leapt from it to her death. But she’s even more troubled by the secrecy surrounding the case. After Sophie performs some quick calculations, she’s left with a nagging question: Was it really suicide?

When one of Sophie’s favorite students, a performer in the concert, is brutally beaten and left in a coma, Sophie’s mind kicks into overdrive. The horrific incidents seem too coincidental to be unrelated, but can Sophie put together the pieces from a twenty-five-year-old murder before any other students get hurt?

Other Books by Ada Madison

A Function of Murder
A Professor Sophie Knowles Mystery #3

The Probability of Murder
A Professor Sophie Knowles Mystery #2

The Square Root of Murder
A Professor Sophie Knowles Mystery #1

Ada Madison's Bio

Camille Minichino has published eight novels in the Periodic Table Mysteries series, featuring retired physicist GLORIA LAMERINO. The series continues in short stories on Kindle and smashwords.com.

As Margaret Grace, she’s published five novels in the Miniature Mysteries series, featuring miniaturist GERALDINE PORTER and her 10-year-old granddaughter, Maddie.

As Ada Madison, she’s poised to release a new series, the Professor Sophie Knowles Mysteries, featuring college professor SOPHIE KNOWLES.

Camille received her Ph.D. in physics from Fordham University, New York City. She is currently on the faculty of Golden Gate University, San Francisco and on the staff of Lawrence Livermore National Laboratory. Camille is on the boards of the California Writers Club and NorCal Sisters in Crime. She’s a member of NorCal Mystery Writers of America and SF Romance Writers of America.