John Earl Clark holds a Master's degree in Human Computer Interaction from
Georgia Tech and an undergraduate degree in Music Engineering from Georgia State
University. He and his co-author, Bryan P. Johnson, worked together at MindSpring
and, later, EarthLink; starting out in Technical Support and Documentation before
moving into application development and, fi nally, the management of a small
development team. After leaving EarthLink in 2002, John began working
independently as a consultant and a programmer, before starting Twelve Foot
Guru, LLC. with Bryan in 2005.
He has been working with Sencha Touch since its fi rst beta releases. He has also
worked with Sencha's ExtJS since its early days when it was still known as YUI-Ext.
He has also previously written a book with Bryan Johnson called Sencha Touch Mobile
JavaScript Framework, Packt Publishing.
When he is not buried in code, John spends his time woodworking, playing guitar,
and brewing his own beer.
