This is the first book on learning Lua for iOS Game development. This book covers the various frameworks that one could use to develop apps using Lua. The book is available in both paperback format as well as kindle format from here .
The link for the book is http://www.apress.com/9781430246626
The Book is written by Jayant C Varma of OZ Apps that has also brought to you sites like
http://howto.oz-apps.com
http://reviewme.oz-apps.com
https://dev.oz-apps.com
and the developer for the hit ZDay Survival simulator game on the iOS and Android platforms amongst other applications.