abstract:Murderous Maths is a series of British educational books by author Kjartan Poskitt. Most of the books in the series are illustrated by illustrator and author Philip Reeve, with the exception of "The 5ecret L1fe of Code5", which is illustrated by Ian Baker, "The Essential Arithmetricks: How to + - × ÷" illustrated by Daniel Postgate and Rob Davis, and "The Murderous Maths of Everything", also illustrated by Rob Davis.