Murderous Maths Box Set (10 Books)

Titles included:

. The Phantom X

. Desperate Measures

. The Perfect Sausage and Other Fundamental Formulas

. Guaranteed to Bend Your Brain

. Do you Feel Lucky?

. Awesome Arithmetricks

. Savage Shapes

. Guaranteed to Mash Your Mind

. The Key to the Universe

. Easy Questions Evil Answers