Dr Alex Blewitt has over 20 years of experience in Objective-C and has been using Apple frameworks since NeXTSTEP 3.0. He upgraded his NeXTstation for a TiBook when Apple released Mac OS X in 2001 and has been developing on it ever since. Alex currently works for a financial company in London and writes for the online technology news site InfoQ. He has authored two other books for Packt Publishing. He also has a number of apps on the App Store through Bandlem Limited. When he's not working on technology and the weather is nice, he likes to go flying from the nearby Cranfield airport. Alex writes regularly on his blog http://alblue.bandlem.com as well tweets regularly on Twitter, @alblue.