Bonnie Pinkwater Series

In The Witch of Agnesi , Bonnie Pinkwater is a teacher, a good one.

She cares about her students. So when Peyton Newlin, a thirteen-year-old math genius, disappears, Bonnie starts nosing around.

One by one, students who were competing with the young genius start turning up dead and Bonnie suspects Peyton may be narrowing the field.

Then Peyton himself turns up murdered. Bonnie's investigation ratchets up.What she discovers is a coven of witches, a teenage comic book magnate, a skinhead Neanderthal with violent propensities, an abusive father, an amorous science teacher, and a mistranslated medieval mathematics manuscript.

Somehow, all the pieces have intersected at the tragically brief life of her math protégé.

As the body count mounts, Bonnie realizes she may have bitten off more than she can chew. Because whoever is eliminating her beloved students, has now decided East Plains, Colorado would be better off without one aging math teacher.

In A Calculated Demise , Bonnie Pinkwater returns with a knack for solving mysteries in her small Colorado town.

When the wrestling coach is found murdered, Bonnie enlists the help of a student to find out what really happened.

Suspects soon turn into victims, however, as more people are killed and less is known about the culprit.

Just when she thinks things can't get any worse, Bonnie's beloved dog is kidnapped, raising the stakes even higher.

A thrilling adventure with twists around every corner, this mystery uses math and its history to unravel the secrets of the crime and hopefully bring another killer to justice.

In Irrational Numbers , Bonnie Pinkwater, full-time math teacher and part-time troublemaker, is drawn into the case when her phone number is found in the pocket of a murdered student who previously came out of the closet in a speech to his classmates.

Joining forces with the school's principal, Lloyd Whittaker, Bonnie begins to investigate--only to have potential suspects start turning up dead.

Using logic and math as a backbone of her investigation, Bonnie must catch the killer before she, too, is added to the growing list of bodies in this chilling casebook full of stunning twists and turns.