|Other Retailer||Price Checked Time||Their Price in NZD||Our Price|
|Amazon UK||2 days ago||39.12||$16.49||You save $22.63|
|Amazon US||today||16.81||$16.49||You save $0.32|
Laurence and Alison Matthews are lecturers, industrial statisticians and bestselling writers who use a simple, lively style to communicate ideas. They live near Hay-on-Wye, UK, with far too many books.