An Egyptian investigator (and outsider) hired to solve the crimes using logic and observation.

You don't need a math degree, but the story is much more rewarding if you enjoy "aha!" moments related to logic.

The book uses real mathematical concepts (like irrational numbers) as central plot points. The "secret" that threatens the Brotherhood is actually a famous mathematical crisis from history.

If you enjoy this, Chicot has continued the "Killing..." series with The Killing of Socrates and The Killing of Plato .