Programming Objective C in Mac OSX

Hi, I'm beginning to learn programming on Mac OSX and I have been told that learning Objective C is the best way to go about it. Would anybody have any suggestions for me (links or books) to help me learn Objective C? I know this is mainly a Linux and Windows programmig forum, but any help help you can provide will be greatly apprieciated. :)

Check to see what compilers are available for MacOSX and look at their manuals. I know that you can use objective c with GCC. < http://gcc.gnu.org/ >

I personally prefer C++ to Objective C, however it's impossible to deny that a lot of systems out there are implemented in Object Oriented C.