The Fractal Murders — Mark Cohen

"I had spent seven years at the university and I'd taken great pains to avoid math classes. Now I was a private eye in search of a math professor."

Three victims, three different states, and three apparently unrelated cases. When Boulder, Colorado, math professor Jayne Smyers discovers each victim had been an expert in fractal geometry, she knows their deaths can't be a coincidence. That's where Pepper Keane comes in. Hired by Jayne after the FBI dismisses the cases, he's a Marine JAG turned private eye, with a vast knowledge of rock and roll and a trace of existential angst. From Hawaii to Harvard, Pepper searches or proof that the deaths were murders committed by the same person. As the evidence mounts and he fears that his favorite professor may be the next target, Pepper begins to see that there's a pattern to everything, especially murder. And that makes him more than qualified to die.