Hi,
I would recommend the following books:
For Basics:
Microsoft .NET Compact Framework Kick Start
by Erik Rubin, Ronnie Yates
Thorough Coverage:
The Definitive Guide to the .NET Compact Framework
by Larry Roof, Dan Fergus
Regards,
Vikram
One of the newest and most comprehensive books (with lots of code samples) is:
.NET Compact Framework Programming with C#, Yao and Durant, Addison-Wesley
(This one is also available in a VB.NET flavor as well.)
For additional reference material, code samples, etc., also be sure to check out blogs and the excellent site, www.opennetcf.org.