I found Napier’s Bones the best book in the series so far. That might be because of the new characters introduced for this book, characters who are unusual and very interesting. They make the story edge into thriller status and a teensy bit away from cozy mystery. As for math teacher Bonnie Pinkwater, she’s a little spiritual, a little cynical, a little sarcastic, a little sad (and for good reason), but a lot clever and logical and a lot loyal to her dear friends, many of them former students. She’s a person I would like to know.
Spiller opens his novels with a jolt and doesn’t stop with the plot complications and character reveals. You can certainly read Napier’s Bones as a standalone, but I recommend you go back and pick up the first book (The Witch of Agnesi)and read straight through the series (A Calculated Demise, Irrational Numbers, Radical Equations, and Napier’s Bones). Highly recommended.