Tablet App Development - Best Reference / Cookbooks?

LazyBoyWrangler writes: I'm an ancient Linux developer (well over thirty) who has been buried in developing and maintaining code for a couple of clients for the past ten years. One of these clients is asking me for development of a remote, secure tablet based application running on (most likely) Android due to client platform distribution cost (250-500 remote clients connecting via SSL-TCP/IP). I'm not discounting Apple either — I strongly recommend use of Apple platforms to my clients. I've got a long standing hatred of Windows platforms due to my costs/pain in supporting anything on them. I just can't afford the time and misery helping one more person with Windows, and the platform instability in terms of user interface/version changes drives me insane.

In the past, I've found O'Reilly books fit my learning style weil enuogh — I have a San Diego quality zoo, not a library. What resources do people recommend for a very experienced developer who has written hundreds of thousands of lines of secure communication / banking code?

Any thoughts?