1.
Everyday Math Tricks for Grown-Ups : Shortcuts and Simple Solutions for the Not-So-Math Minded
by Poskitt, Kjartan
ISBN: 9781606523292
4.
10.
Hippo Murderous Maths: The Essential Arithmetricks
by Kjartan Poskitt
ISBN: 9780439011570
List Price: $4.50
21.
Agatha Parrot and the Odd Street School Ghost
by Poskitt, Kjartan, Hargis, Wes
ISBN: 9780544935303
List Price: $6.99