The seventh Murderous maths book. Again, another amazingly brilliant book, this time explaining in finer detail, geometry, or to be precise, shape. As an avid fan of the Murderous maths books, and Mr Poskitt himself, this witty and tremendously funny book explains certain topics of mathematics that I would never understand in Maths lessons at school. Philip Reeve's cartoons and diagrams add to the book certain comical effects. I love this book because it explains so simply maths that would otherwise be, well, murderous. With phazmacycles, and naked colnels involved, this book will really make you laugh, and you will still learn things without realising, through jokes, sarcasm and clever wit. I give it 10/10.