Software Quality: Theory and Management has been in print around the world since 1992. After the publisher accidentally removed it from the European market in 1998, it continued to sell well in South East Asia and has to date sold over 10,000 copies world-wide. Originally used with BSc and MSc students at the University of Salford, previous editions have been used as a textbook in the UK, Europe, North America and Asia. However, the contents of the second edition look sadly dated by now, and even core concepts such as development methodologies have moved on substantially. Therefore, I have decided to produce a third edition which has been updated in both content and method of delivery.