|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||2 days ago||51.95||$35.88||You save $16.07|
|Book Depository US||4 days ago||43.19||$35.88||You save $7.31|
Brett Petersel has more than 10 years of experience in social media, community management, and event promotions. He was hailed as "one of the great business minds at Mashable," and named "the king of social" at South by SouthWest (SXSW). Brett is currently Director of Business Development at The Next Web, a source for International Technology News, Business and Culture.Esther Schindler has been a technology journalist since 1992 specialising in translating "geek" into English. She's been a programmer, computer consultant, corporate trainer on operating system internals, and retail store owner.