The subtitle of The Last Equation of Isaac Severy by Nova Jacobs is A Novel in Clues. How clever, maybe even a bit twee. Is Jacobs about to lead readers on a choose-your-own-adventure chase? In a way, yes.

This debut mystery is fun, but not necessarily light. In scene one, protagonist Hazel Severy, a 30-something failed bookseller, attends the funeral of her grandfather, the titular Isaac Severy, a mathematician of international repute. His death plunges his family and friends into deep mourning. Enter Philip Severy, Isaac’s son and near-professional equal. While Isaac dedicated his life to pure mathematics, Philip is a theoretical physicist obsessed with his place in the history of string theory. Enter also Hazel’s beloved brother Gregory, a member of the Los Angeles Police Department. Oh, and weird cousin Alex.

As Jacobs peels back the layers on the Severy clan, we discover that Philip is a professional prevaricator in his personal life, Gregory has some unresolved issues and Alex is as much of a liar as all the rest of them — and I have not even mentioned all of the rest of them.

A deceased family member with a mysterious will sets the plot for a quirky novel about family, death, madness — and mathematics

When Hazel decides at the funeral to break the seal on a letter from her grandfather, she sets in motion one set of clues that will take her from a typeset puzzle to a mysterious pink hotel to — well, no spoilers. At the same time, the perspectives of Philip and Gregory show that there are darker layers in the family than Hazel knows. Philip is being pursued by the enigmatic P. Booth Lyons of an organisation called “Government-Scholar Relations” and Gregory is pursuing the greatest criminal he has ever known.

Isaac may have understood the dysfunction of his son and grandson, which is why he sends the confused and damaged, but also kind and honest, Hazel down a rabbit hole of his own making. If ever there were a book-length explanation of “a method to his madness”, this is it. Isaac plays a shell game with his beloved granddaughter that even involves a shell game (or at least, the explication of one).

That night, as she sat cross-legged on the mattress, eyes parched from evaporated tears, she recalled a curious detail from her conversation with Gregory: Isaac had prepared two breakfasts for himself that morning, one half eaten, the other untouched. She had heard vague reports of his absentmindedness, but in her weekly phone calls to him, he had sounded as quick as ever, always armed with amusing stories, and never repeating the ones she’d already heard. At 79 years old, Isaac had been remarkably healthy. He had looked no older than 65, and the only ailment she had known him to have was his lifelong struggle with migraines. Migraines ran in the family, but mental illness? Depression? Had she been so consumed with her own daily battles that she had missed something obvious? Now, as she stared at his casket, she felt a fresh stab of shame.— Excerpt from the book

If occasionally, going down the rabbit hole with Hazel seems digressive, that is all right. It staves off some heart-wrenchingly sad realities on the surface. Hazel and Alex get closer and closer to understanding Grandfather Isaac’s “last equation”, and it is a doozy — one that might explain Isaac’s death and many others as well. Jacobs has penned a novel that is anything but clueless, filled with consideration and compassion for the different levels of human damage and comprehension.

The reviewer is the editor of The Books That Changed My Life: Reflections by 100 Authors, Actors, Musicians and Other Remarkable People

  • By arrangement with The Washington Post

The Last Equation of Isaac Severy: A Novel
in Clues
By Nova Jacobs
Touchstone, US
ISBN: 978-1501175121
336pp.

Published in Dawn, Books & Authors, March 25th, 2018

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