High Quality Content by WIKIPEDIA articles! 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. The Murderous Maths books have been published in over 25 countries. The books, which are aimed at children aged 8 and above, teach maths, spanning from basic arithmetic to relatively complex concepts such as the quadratic formula. The books are written in an informal similar style to the Horrible Histories, Horrible Science and Horrible Geography series, involving evil geniuses, gangsters, love stories and smelly burgers. The author also maintains a website for the series, which has been running for the past 10 years . Данное...