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.

"The Witch Of Agnesi is an excellent read. The characters are well fleshed out and the story line has enough left turns that it kept me guessing. ... I will be watching for more from this skilled writer."
~ NovelSpot

"The nonstop action and intrigue will hold most readers; the suspense is ever present, and the mystery has a good balance of clues and misinformation to keep amateur sleuths turning the pages."
~ Dylan Thomarie, Johnstown High School, NY. School Library Journal

"Bonnie Pinkwater is a teacher that rules! The Witch Of Agnesi will appeal to everyone who has—or ever had—a cool teacher, a high school rival, or an interest in math. It’s the Magic School meets Numbers from the moment Peyton Newlin goes missing to the ultimate climax, and keeps you reading under the covers with a flashlight all the way to the grand finale. It’s a great read."
~ Christine Goff, Author of Death Shoots A Birdie.